{
  "schema": "canli.company-reference.v1",
  "cik": "0000877890",
  "name": "CITRIX SYSTEMS INC",
  "selection_policy": "extended-v23",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0000877890.json",
  "source_sha256": "170043b3a1cad6735638fa7c7ad992e9fa0928f4e8684cd8dc4a1d87f6122aba",
  "fetched_at": "2026-09-22T19:32:18.361Z",
  "policy": "Latest-filed annual-report facts per unit and reporting period at capture time. Duration facts cover 300 to 400 days. This selection can include restatements and is not a point-in-time backtest dataset. Missing concepts are omitted, never zero-filled. Values retain original units and are not currency converted. Extended concepts require compatible unit shapes and at least three reporting ends with changing values within one unit. Constant or incompatible added histories are omitted.",
  "claim_boundary": "Public company accounting reference, not market prices, returns, an investment recommendation, or ALPHAC performance. Validate a separately constructed return series with the validation API; accounting values are not returns.",
  "concepts": [
    {
      "tag": "Assets",
      "taxonomy": "us-gaap",
      "label": "Total assets",
      "kind": "instant",
      "meaning": "Resources recognized on the balance sheet. Book assets are not the market value of the business.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 6975517000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 4890347000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 4388926000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 5136049000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 5820176000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 6390227000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 5467517000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 5512007000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 5212249000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 4796402000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 4099541000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 3703600000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 3091147000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 2694306000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "StockholdersEquity",
      "taxonomy": "us-gaap",
      "label": "Stockholders equity",
      "kind": "instant",
      "meaning": "The reported residual interest after liabilities. It is an accounting amount, not market capitalization.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 547257000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 112143000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 837656000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 551519000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 992461000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 2608727000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1973446000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2173645000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 3319807000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 3121777000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2730490000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2552991000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 2188507000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 1917865000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        },
        {
          "end": "2007-12-31",
          "val": 1838325000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007Q4I",
          "unit": "USD"
        },
        {
          "end": "2006-12-31",
          "val": 1464289000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2006Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CashAndCashEquivalentsAtCarryingValue",
      "taxonomy": "us-gaap",
      "label": "Cash and cash equivalents",
      "kind": "instant",
      "meaning": "Cash and qualifying short-term liquid investments under the filer’s accounting policy. Restricted cash and longer-term investments may be reported separately.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 513993000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 752895000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 545761000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 618766000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1115130000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 836095000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 310756000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 260149000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 280740000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 643609000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 333296000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 396162000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 261443000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 261443000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2008Q4I",
          "unit": "USD"
        },
        {
          "end": "2007-12-31",
          "val": 223749000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2007Q4I",
          "unit": "USD"
        },
        {
          "end": "2006-12-31",
          "val": 349054000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2006Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetIncomeLoss",
      "taxonomy": "us-gaap",
      "label": "Net income or loss",
      "kind": "duration",
      "meaning": "Reported profit or loss for the period. Check the filing for attribution, exceptional items and discontinued operations before comparing companies.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 307499000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 504446000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 681813000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 575667000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -20719000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 536112000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 319361000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 251723000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 339523000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 352547000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 356322000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 277065000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 191017000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 178276000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 214483000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInOperatingActivities",
      "taxonomy": "us-gaap",
      "label": "Operating cash flow",
      "kind": "duration",
      "meaning": "Cash generated or used by operating activities. Working-capital timing can make this differ substantially from reported income.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 671651000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 935809000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 783070000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 1035345000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 908276000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1115830000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1034548000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 818527000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 679122000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 616292000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 483974000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 462107000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 422275000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsToAcquirePropertyPlantAndEquipment",
      "taxonomy": "us-gaap",
      "label": "Capital expenditure payments",
      "kind": "duration",
      "meaning": "Cash payments to acquire property, plant and equipment. This taxonomy concept does not capture every form of investment or acquisition.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 83432000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 41438000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 63454000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 69354000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 80901000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 85035000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 97566000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 165417000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 162889000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 122958000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 111932000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 75376000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 76246000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 181046000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 85919000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RevenueFromContractWithCustomerExcludingAssessedTax",
      "taxonomy": "us-gaap",
      "label": "Contract revenue excluding tax",
      "kind": "duration",
      "meaning": "Revenue from customer contracts excluding assessed taxes under this specific taxonomy concept. It is not automatically comparable to older revenue tags.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 3217170000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 3236700000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 3010564000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 2973903000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 2824686000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 2736080000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInFinancingActivities",
      "taxonomy": "us-gaap",
      "label": "Financing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from financing activities, including borrowing, repayments and transactions with owners. A positive amount does not establish operating profitability.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 1094906000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -595188000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -1890510000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -1658041000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -694367000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -38031000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -691451000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -149782000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -292614000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -26316000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -45537000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": -206934000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": -131822000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInInvestingActivities",
      "taxonomy": "us-gaap",
      "label": "Investing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from investing activities, including asset purchases, disposals and investment transactions. This differs from capital expenditure payments alone.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -1999517000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -138305000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1035749000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 132180000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -63921000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -484204000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -224415000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -357940000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -451181000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -457042000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -502865000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": -158622000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": -417601000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RetainedEarningsAccumulatedDeficit",
      "taxonomy": "us-gaap",
      "label": "Retained earnings or deficit",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Accumulated undistributed earnings or deficit at the reporting date. This balance is not cash available for distribution.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 5100624000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 4984333000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 4660145000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 4169019000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 3509484000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 4010737000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3474625000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 3155264000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2903541000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2564018000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2211471000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 1855149000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 1578084000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 1387067000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfSharesOutstandingBasic",
      "taxonomy": "us-gaap",
      "label": "Basic weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Time-weighted shares used for basic earnings per share. This denominator differs from shares outstanding at a single reporting date.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 124113000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 123575000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 130853000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 136030000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 150779000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 155134000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 158874000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 169879000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 186672000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 186722000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 187315000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 185959000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 181805000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "shares"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 183023000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "shares"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 181501000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "WeightedAverageNumberOfDilutedSharesOutstanding",
      "taxonomy": "us-gaap",
      "label": "Diluted weighted-average shares",
      "kind": "duration",
      "unitKind": "shares",
      "meaning": "Weighted-average shares used for diluted earnings per share. Potential shares are included under the applicable dilution rules, not simply added to outstanding shares.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 126259000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 126152000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 135495000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 145934000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 155503000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 157084000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 160362000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 171270000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 188245000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 189129000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 190641000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 190335000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 184985000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "shares"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 186682000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "shares"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 187380000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareBasic",
      "taxonomy": "us-gaap",
      "label": "Basic earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per basic common share or unit. Inspect attribution, share classes and restatements before comparing periods. This is not a market return.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 2.48,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 4.08,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 5.21,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 4.23,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -0.13,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 3.46,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2.01,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1.48,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1.82,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1.89,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1.9,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1.49,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1.05,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD/shares"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 0.97,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD/shares"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 1.18,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "EarningsPerShareDiluted",
      "taxonomy": "us-gaap",
      "label": "Diluted earnings per share",
      "kind": "duration",
      "unitKind": "per-share",
      "meaning": "Reported earnings or loss per share under dilution rules. Antidilutive instruments may be excluded. A diluted value can equal the basic value without implying no potential dilution.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 2.44,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 4,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 5.03,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 3.94,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -0.13,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 3.41,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1.99,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1.47,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1.8,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1.86,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1.87,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1.46,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1.03,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD/shares"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 0.96,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD/shares"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 1.14,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD/shares"
        }
      ]
    },
    {
      "tag": "IncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Current and deferred income tax expense or benefit for continuing operations. This accounting expense differs from cash taxes paid.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -140352000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 50434000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -172313000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 53788000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 528361000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 57915000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -50549000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 23983000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 48367000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 57682000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 74867000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 57379000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 2875000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 18647000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 36425000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PropertyPlantAndEquipmentNet",
      "taxonomy": "us-gaap",
      "label": "Net property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Carrying amount of property, plant and equipment after accumulated depreciation, depletion and amortization. It is not replacement cost or market value.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 219031000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 208811000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 231894000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 243396000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 252932000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 261954000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 373817000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 367779000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 338996000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 303294000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 277429000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 250482000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 247703000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 254334000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ShareBasedCompensation",
      "taxonomy": "us-gaap",
      "label": "Share-based compensation expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Reported noncash expense for share-based payment arrangements. Noncash treatment does not mean the awards have no economic cost to shareholders.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 346751000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 307710000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 278892000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 203619000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 165120000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 152739000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 128262000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 169287000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 183941000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 149940000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 92909000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 103758000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 111419000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 124615000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 65491000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingIncomeLoss",
      "taxonomy": "us-gaap",
      "label": "Operating income or loss",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Operating revenue less operating expenses for the reporting period. It excludes items outside the reported operating result and is not free cash flow.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 236620000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 608808000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 536118000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 677960000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 570997000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 560164000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 202792000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 302311000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 380717000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 390778000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 416966000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 320716000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 178677000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 170001000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 202407000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AssetsCurrent",
      "taxonomy": "us-gaap",
      "label": "Current assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Assets classified as current under the normal operating cycle or one-year boundary. Not all current assets can be converted immediately into cash.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 1718985000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1991106000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1512732000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 2086901000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 2621423000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 2561277000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1683951000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1688324000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1563095000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 1713735000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 1373030000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 1470479000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 1039295000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 940140000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InterestExpense",
      "taxonomy": "us-gaap",
      "label": "Interest expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Borrowing costs recognized as interest expense. This is distinct from cash interest paid and may not include every capitalized borrowing cost.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 91793000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 64687000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 45974000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 80162000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 51609000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 44949000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 44153000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 28332000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 128000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 312000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 458000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 426000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 444000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 737000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "LiabilitiesCurrent",
      "taxonomy": "us-gaap",
      "label": "Current liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Obligations classified as current under the operating-cycle or one-year boundary. The balance includes more than short-term borrowing.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 2354071000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 2152427000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1828587000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 2911140000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1687079000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 3098349000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1680969000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1590109000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1464061000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 1342873000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 1179130000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 1020012000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 834364000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 730917000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccountsPayableCurrent",
      "taxonomy": "us-gaap",
      "label": "Current accounts payable",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current amounts owed to suppliers for goods and services received. This is one component of current liabilities, not all accrued obligations.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 165250000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 92266000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 84538000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 75551000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 66893000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 72724000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 95396000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 79884000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 78452000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 71116000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 58034000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 65842000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 57352000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 46672000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Goodwill",
      "taxonomy": "us-gaap",
      "label": "Goodwill carrying amount",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Recognized goodwill remaining after accumulated impairment. It arises from business combinations and does not measure the current value of the company’s brand.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 3400792000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1798408000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1798408000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 1802670000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1614494000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1585893000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1585621000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1796851000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1768949000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 1518219000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 1239120000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 921100000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 899819000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 904504000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "FiniteLivedIntangibleAssetsNet",
      "taxonomy": "us-gaap",
      "label": "Net finite-lived intangible assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Finite-lived intangible assets after amortization. This excludes goodwill and should not be combined with indefinite-lived intangible assets without checking scope.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 760293000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 81491000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 108478000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 167187000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1600000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 227993000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 283418000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 390717000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2014Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccountsReceivableNetCurrent",
      "taxonomy": "us-gaap",
      "label": "Net current accounts receivable",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current customer receivables after the allowance for credit loss. The balance is not cash collected or a guarantee of collection.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 885311000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 858009000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 720359000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 688420000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 712535000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 681206000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 669276000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 674401000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 654821000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 630956000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 484431000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 378395000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 304912000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 231296000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsForRepurchaseOfCommonStock",
      "taxonomy": "us-gaap",
      "label": "Common-stock repurchase payments",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash paid to reacquire common stock during the period. This is not an authorization limit or a direct measure of the net change in share count.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 0,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 1288483000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 453853000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 1261153000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 1174957000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 28689000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 755704000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1640885000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 406326000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 251008000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 424849000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 433739000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 214944000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 256458000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 259970000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingExpenses",
      "taxonomy": "us-gaap",
      "label": "Operating expenses",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Recurring operating costs under this accounting concept, generally excluding production costs included in cost of sales. Check filing presentation before combining expense subtotals.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 2355473000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 2129346000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 2010399000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 1862140000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 1814043000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1771027000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1969322000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2220326000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 2034922000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1791208000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1495827000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1321680000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1248101000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 1238221000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 1051928000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InventoryNet",
      "taxonomy": "us-gaap",
      "label": "Net inventory",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Inventory carrying amount after applicable valuation and LIFO reserves. It does not establish realizable selling proceeds or inventory turnover without other inputs.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 23158000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 20089000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 15898000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 21905000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 13912000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 12522000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 10521000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 12617000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 14107000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 10723000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 8507000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 6980000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 8664000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 11226000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "GrossProfit",
      "taxonomy": "us-gaap",
      "label": "Gross profit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Revenue less the costs directly attributed to the goods or services sold. It precedes other operating expenses and is not net income.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 2592093000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 2738154000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 2546517000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 2540100000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 2385040000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 2331191000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2172114000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2522637000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 2415639000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 2181986000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1912793000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1642396000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1426778000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 1408222000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 1254335000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CostOfRevenue",
      "taxonomy": "us-gaap",
      "label": "Cost of revenue",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Costs attributed to goods produced and sold and services provided during the period. This is not the sum of every operating expense.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 625077000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 498546000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 464047000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 433803000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 439646000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 404889000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 474040000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 620219000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 502795000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 404137000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 293599000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 232266000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 187310000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 175132000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 137607000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CommonStockSharesOutstanding",
      "taxonomy": "us-gaap",
      "label": "Common shares outstanding",
      "kind": "instant",
      "unitKind": "shares",
      "meaning": "Common shares outstanding at the reporting date. This point-in-time count differs from the weighted-average shares used for earnings per share and can exclude other share classes.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 325174000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "shares"
        },
        {
          "end": "2020-12-31",
          "val": 321964000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "shares"
        },
        {
          "end": "2019-12-31",
          "val": 318760000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "shares"
        },
        {
          "end": "2018-12-31",
          "val": 309761000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "shares"
        },
        {
          "end": "2017-12-31",
          "val": 305751000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "shares"
        },
        {
          "end": "2016-12-31",
          "val": 302851000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "shares"
        },
        {
          "end": "2015-12-31",
          "val": 299113000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "shares"
        },
        {
          "end": "2014-12-31",
          "val": 294674000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "shares"
        },
        {
          "end": "2013-12-31",
          "val": 291078000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "shares"
        },
        {
          "end": "2012-12-31",
          "val": 287123000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "shares"
        },
        {
          "end": "2011-12-31",
          "val": 282774000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "shares"
        },
        {
          "end": "2010-12-31",
          "val": 277922000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "shares"
        },
        {
          "end": "2009-12-31",
          "val": 264831000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
      "taxonomy": "us-gaap",
      "label": "Cash including restricted cash",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cash, cash equivalents and restricted cash as reported in the cash flow reconciliation. Restricted amounts are not freely available, so this is not the same as unrestricted cash.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 513993000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 752895000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 545761000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 618766000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1115130000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 956956000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2016Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
      "taxonomy": "us-gaap",
      "label": "Accumulated other comprehensive income or loss",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cumulative other comprehensive items after tax, such as translation and unrealized hedging or securities effects. These amounts have not passed through net income.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": -2896000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": -3649000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": -5127000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": -8154000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": -10806000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": -28704000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": -28527000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": -36790000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 4951000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": -7705000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": -11561000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2023000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": -2060000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": -15852000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
      "taxonomy": "us-gaap",
      "label": "Total equity including noncontrolling interests",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Equity including the portion attributable to noncontrolling interests. It is larger than or equal to parent stockholders equity and is not market capitalization.",
      "observations": [
        {
          "end": "2013-12-31",
          "val": 3319807000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 3121777000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2730490000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2560588000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 2188507000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 1917865000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2008Q4I",
          "unit": "USD"
        },
        {
          "end": "2007-12-31",
          "val": 1838325000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2007Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeaseRightOfUseAsset",
      "taxonomy": "us-gaap",
      "label": "Operating lease right-of-use asset",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Carrying amount of the right to use leased assets under operating leases. It reflects discounted remaining payments, not the value of the underlying property.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 154685000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 187129000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 206154000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-01-01",
          "val": 194500000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeaseLiability",
      "taxonomy": "us-gaap",
      "label": "Operating lease liability",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Present value of remaining operating lease payments. Discount-rate choices and lease terms affect the amount; it is not the sum of undiscounted future rent.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 223020000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 244126000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 256407000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-01-01",
          "val": 256400000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "LongTermDebt",
      "taxonomy": "us-gaap",
      "label": "Long-term debt",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Long-term borrowings under this concept, which can include the current portion depending on presentation. It is not total liabilities and may exclude leases and other obligations.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 3326327000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1732622000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 742926000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 741825000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 2127474000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 0,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PropertyPlantAndEquipmentGross",
      "taxonomy": "us-gaap",
      "label": "Gross property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cost of property, plant and equipment before accumulated depreciation. Historical cost does not indicate current value or replacement cost.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 920755000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1042974000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1018311000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 959767000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 883231000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 831871000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1184593000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1043990000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 765984000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 645724000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 562923000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 495357000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment",
      "taxonomy": "us-gaap",
      "label": "Accumulated depreciation on property, plant and equipment",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Cumulative depreciation, depletion and amortization recorded against property, plant and equipment. It measures cost allocation to date, not physical wear or market value.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 733130000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 861933000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 806099000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 741587000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 675892000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 602433000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 852460000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 722691000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 479459000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 384179000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 328325000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 263538000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IntangibleAssetsNetExcludingGoodwill",
      "taxonomy": "us-gaap",
      "label": "Net intangible assets excluding goodwill",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Intangible assets other than goodwill after amortization and impairment. Internally developed intangibles are usually not recognized, so this understates what a company relies on.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 760293000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 81491000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 108478000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 167187000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 141952000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 173681000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 283418000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 390717000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 509595000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 556205000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 343372000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 178144000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 213195000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 270222000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OtherAssetsNoncurrent",
      "taxonomy": "us-gaap",
      "label": "Other noncurrent assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Noncurrent assets the filer does not present separately. The composition differs by filer and is described only in the filing.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 289961000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 222533000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 152806000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 124578000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 52685000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 54449000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 56449000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 67028000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 60496000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 66539000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 61267000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 47726000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 45545000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 36585000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OtherLiabilitiesNoncurrent",
      "taxonomy": "us-gaap",
      "label": "Other noncurrent liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Noncurrent liabilities the filer does not present separately. The composition differs by filer and is described only in the filing.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 47531000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 72942000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 67526000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 148499000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 121936000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 119813000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 87717000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 97529000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 115322000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 99033000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 48680000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 8362000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 4940000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 744000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccruedLiabilitiesCurrent",
      "taxonomy": "us-gaap",
      "label": "Accrued current liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current obligations accrued for goods and services received but not yet invoiced or paid. This is one component of current liabilities, not all short-term obligations.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 444767000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 507185000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 331680000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 290492000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 277679000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 256799000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 317468000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 298079000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 257606000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 257135000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 214836000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 289838000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 221498000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 195550000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2008Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PrepaidExpenseAndOtherAssetsCurrent",
      "taxonomy": "us-gaap",
      "label": "Prepaid expenses and other current assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Prepayments and other current assets grouped under this concept. The balance is not cash and its composition differs by filer.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 283337000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 236000000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 187659000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 174195000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 147330000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 124842000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 132784000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 166005000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 110981000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 106579000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 95419000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 105073000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ContractWithCustomerLiabilityCurrent",
      "taxonomy": "us-gaap",
      "label": "Current contract liabilities",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Consideration received before performance obligations are satisfied, often called deferred revenue. It is an obligation to deliver, not earned revenue or cash available.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 1708058000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 1510216000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 1352333000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 1345243000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-01-01",
          "val": 1250000000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 1308474000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "DeferredTaxAssetsNet",
      "taxonomy": "us-gaap",
      "label": "Net deferred tax assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Deferred tax assets after the valuation allowance. Realization depends on future taxable income, so the balance is not a receivable from tax authorities.",
      "observations": [
        {
          "end": "2021-12-31",
          "val": 651038000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 452454000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 432992000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 171110000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 162643000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 252071000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 250605000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 272879000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 302913000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 256580000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 216271000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
      "taxonomy": "us-gaap",
      "label": "Pre-tax income or loss from continuing operations",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Income or loss from continuing operations before income taxes and noncontrolling interests. It excludes discontinued operations and is not net income.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 167147000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 554880000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 509500000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ProfitLoss",
      "taxonomy": "us-gaap",
      "label": "Profit or loss including noncontrolling interests",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net income or loss including the portion attributable to noncontrolling interests. It can differ from the net income attributable to the parent that per-share figures use.",
      "observations": [
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 339523000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 352547000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 355630000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 276441000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 191017000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 178276000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ComprehensiveIncomeNetOfTax",
      "taxonomy": "us-gaap",
      "label": "Comprehensive income or loss",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net income plus other comprehensive income after tax. It includes unrealized items that net income excludes and is not a cash measure.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 308252000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 505924000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 684840000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 578319000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -16221000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 535935000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 327624000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 209982000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 352179000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 356403000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 341354000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 279900000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 204809000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "GeneralAndAdministrativeExpense",
      "taxonomy": "us-gaap",
      "label": "General and administrative expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "General and administrative costs reported under this concept, separate from selling expense. Filers group overhead differently, so compare presentation before comparing companies.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 409630000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 352109000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 320429000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 315343000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 302565000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 316838000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 286424000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 319922000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 260236000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 245259000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 213673000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 173394000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 239623000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 256679000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 229229000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Depreciation",
      "taxonomy": "us-gaap",
      "label": "Depreciation expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Depreciation recognized for the period under this concept. It is a noncash allocation of asset cost and may exclude amortization and depletion reported elsewhere.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 61633000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 65125000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 72079000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 78983000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 87137000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 107954000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 102207000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 137945000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 127959000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 100299000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 88124000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 73375000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 69688000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 52954000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 38214000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AmortizationOfIntangibleAssets",
      "taxonomy": "us-gaap",
      "label": "Amortization of intangible assets",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Amortization recognized on finite-lived intangible assets. It follows acquisition accounting and does not indicate the intangibles are losing usefulness at that rate.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 18000000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 192325000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 139541000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 114574000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 71131000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 64783000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 68889000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 70752000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 46983000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OtherNonoperatingIncomeExpense",
      "taxonomy": "us-gaap",
      "label": "Other nonoperating income or expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Other income or expense outside operations under this concept. The composition is filer-specific and can include one-time items.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 21088000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 7651000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1076000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -8373000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 3150000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -4131000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -5730000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -7694000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -893000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 9611000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -288000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -1473000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 532000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": -4140000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": -466000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "CurrentIncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Current income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Income tax expense or benefit for the period that is currently payable or refundable. It differs from cash taxes paid and from total tax expense.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 20497000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 54408000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 72620000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 66944000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 434203000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 79569000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 34686000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 60965000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 100215000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 128473000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 91096000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 104055000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 53725000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 25490000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "DeferredIncomeTaxExpenseBenefit",
      "taxonomy": "us-gaap",
      "label": "Deferred income tax expense or benefit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The deferred portion of income tax expense or benefit, arising from timing differences. It is not tax paid in the period.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -160849000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -3974000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -244933000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -13156000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 94158000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -21654000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -85235000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -36982000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -51848000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -70791000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -16229000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -46676000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -50850000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": -6843000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": -634000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InterestPaidNet",
      "taxonomy": "us-gaap",
      "label": "Interest paid, net",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash interest paid during the period, net of amounts capitalized where the filer reports it that way. It differs from interest expense recognized.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 84802000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 52638000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 37667000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 41834000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 8764000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 7847000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 8215000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "OperatingLeasePayments",
      "taxonomy": "us-gaap",
      "label": "Operating lease payments",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash paid for operating lease liabilities during the period. It differs from lease expense recognized and excludes variable payments in some presentations.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 59729000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 55514000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 54690000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncreaseDecreaseInAccountsReceivable",
      "taxonomy": "us-gaap",
      "label": "Change in accounts receivable",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The cash flow adjustment for the change in receivables during the period. A positive value under this concept means receivables grew and reduced operating cash flow.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 24182000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 151830000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 38994000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -18703000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 33904000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 61662000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 8866000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 30962000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 22951000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 107628000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 95481000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 79058000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 74604000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 10975000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 19645000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncreaseDecreaseInInventories",
      "taxonomy": "us-gaap",
      "label": "Change in inventories",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The cash flow adjustment for the change in inventories during the period. A positive value under this concept means inventory grew and reduced operating cash flow.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 4028000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 4220000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -3046000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 8239000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 2545000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 4133000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -703000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1167000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 5591000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 2024000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 3097000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1192000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -601000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 2271000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 6316000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncreaseDecreaseInAccountsPayable",
      "taxonomy": "us-gaap",
      "label": "Change in accounts payable",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "The cash flow adjustment for the change in payables during the period. A positive value under this concept means payables grew and added to operating cash flow.",
      "observations": [
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 64219000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 7532000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 8994000,
          "accn": "0000877890-22-000019",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-02-16",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 6804000,
          "accn": "0000877890-21-000051",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-02-08",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -7238000,
          "accn": "0000877890-20-000051",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-02-14",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -16365000,
          "accn": "0000877890-19-000035",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-02-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 6408000,
          "accn": "0000877890-18-000025",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-16",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 40000,
          "accn": "0000877890-17-000030",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-02-16",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 3092000,
          "accn": "0000877890-16-000184",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-02-18",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -426000,
          "accn": "0000877890-15-000016",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-19",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -11758000,
          "accn": "0000877890-14-000007",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-20",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 9612000,
          "accn": "0000877890-13-000016",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-21",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 4613000,
          "accn": "0000877890-12-000019",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": -6808000,
          "accn": "0001193125-11-045415",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-24",
          "frame": "CY2008",
          "unit": "USD"
        },
        {
          "start": "2007-01-01",
          "end": "2007-12-31",
          "val": 5382000,
          "accn": "0001193125-10-037944",
          "fy": 2009,
          "fp": "FY",
          "form": "10-K",
          "filed": "2010-02-24",
          "frame": "CY2007",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/170043b3a1cad6735638fa7c7ad992e9fa0928f4e8684cd8dc4a1d87f6122aba.json.gz"
}
