{
  "schema": "canli.company-reference.v1",
  "cik": "0001172139",
  "name": "BILL BARRETT CORPORATION",
  "selection_policy": "extended-v23",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001172139.json",
  "source_sha256": "1243607d4b918c03d594bb2801cb494ffca9dcc45df1b35c4ccb2269b1fb75cf",
  "fetched_at": "2026-09-23T02:48:35.047Z",
  "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": "2017-12-31",
          "val": 1390706000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1385341000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1506520000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2244484000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2381513000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2869449000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2687930000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2038500000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 1866123000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009Q4I",
          "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": "2017-12-31",
          "val": 598554000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 571543000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 549416000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1029488000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 1005718000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 1182775000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 1218838000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 1140962000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 1028555000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 1099233000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008Q4I",
          "unit": "USD"
        },
        {
          "end": "2007-12-31",
          "val": 773511000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2007Q4I",
          "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": "2017-12-31",
          "val": 314466000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 275841000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 128836000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 165904000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 54595000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 79445000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 57331000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 58690000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 54405000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 43063000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2008Q4I",
          "unit": "USD"
        },
        {
          "end": "2007-12-31",
          "val": 60285000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2007Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -138225000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -170378000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -487771000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 15081000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -192733000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 582000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 30707000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 80502000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 50218000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 105259000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 121990000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 121736000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 193678000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 261717000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 265265000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 388436000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 479348000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 447188000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 480744000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 402947000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Revenues",
      "taxonomy": "us-gaap",
      "label": "Revenue",
      "kind": "duration",
      "meaning": "Revenue under this specific accounting concept. A missing value is not zero; filers can use other revenue concepts.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 252839000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 178819000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 207892000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 472291000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 568093000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 700195000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 785624000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 709043000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 598163000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 617911000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 55646000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 108407000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -28228000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -121103000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -153086000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 270675000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 475939000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 3414000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -18768000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 150623000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -139011000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -83138000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -202518000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -29305000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -137029000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -636997000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -956646000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -446317000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -450634000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": -570792000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-12-31",
          "val": -681062000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": -542328000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": -371950000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 115821000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 100740000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 293473000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 292891000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 262184000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 181682000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 76859000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 55384000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 48303000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 48011000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 47496857,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 47194668,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 46535632,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 45217566,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 44732051,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "shares"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 44432383,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 76859000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 55384000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 48303000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 48436000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 47496857,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 47353951,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 47236663,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 45887392,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 45035972,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "shares"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 45036545,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -1.8,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -3.08,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -10.1,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 0.31,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -4.06,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 0.01,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 0.66,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1.78,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1.12,
          "accn": "0001193125-12-074972",
          "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": 2.37,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -1.8,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -3.08,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -10.1,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 0.31,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -4.06,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 0.01,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 0.65,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1.75,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1.12,
          "accn": "0001193125-12-074972",
          "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": 2.34,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -1402000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 0,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -177085000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 17909000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -118633000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1636000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 17672000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 47953000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 37956000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 63175000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-12-31",
          "val": 1018880000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1062149000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 1170684000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 1753121000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2202496000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2611337000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2406764000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 1811819000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 1659260000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -65925000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -99246000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -706012000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -96128000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -179977000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 23209000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 121655000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 182934000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 118383000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 186115000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-12-31",
          "val": 367663000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 318452000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 274317000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 426105000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 157247000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 228339000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 246343000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 207648000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 180039000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 57710000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 59373000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 65305000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 69623000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 88507000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 95506000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 58616000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 44302000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 30647000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 19717000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-12-31",
          "val": 148934000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 85018000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 145231000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 264687000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 192719000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 213133000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 233198000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 165957000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 153292000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009Q4I",
          "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": "2017-12-31",
          "val": 51415000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 32837000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 43461000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 112209000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 97586000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 112011000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 101500000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 72594000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 62573000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009Q4I",
          "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": "2017-12-31",
          "val": 110363539,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "shares"
        },
        {
          "end": "2016-12-31",
          "val": 75721360,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "shares"
        },
        {
          "end": "2015-12-31",
          "val": 49864512,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015Q4I",
          "unit": "shares"
        },
        {
          "end": "2014-12-31",
          "val": 49526637,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2014Q4I",
          "unit": "shares"
        },
        {
          "end": "2013-12-31",
          "val": 49152448,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2013Q4I",
          "unit": "shares"
        },
        {
          "end": "2012-12-31",
          "val": 48150475,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2012Q4I",
          "unit": "shares"
        },
        {
          "end": "2011-12-31",
          "val": 47809903,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2011Q4I",
          "unit": "shares"
        },
        {
          "end": "2010-12-31",
          "val": 46813269,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2010Q4I",
          "unit": "shares"
        },
        {
          "end": "2009-12-31",
          "val": 45475585,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2009Q4I",
          "unit": "shares"
        },
        {
          "end": "2008-12-31",
          "val": 45128431,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2008Q4I",
          "unit": "shares"
        }
      ]
    },
    {
      "tag": "AdditionalPaidInCapital",
      "taxonomy": "us-gaap",
      "label": "Additional paid-in capital",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Capital contributed above par value under this concept. It records historical contributions, not the current value of the equity or cash on hand.",
      "observations": [
        {
          "end": "2017-12-31",
          "val": 1279507000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1113797000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 921318000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 913619000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 904261000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 883923000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 869856000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 830903000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 792418000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009Q4I",
          "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": "2014-12-31",
          "val": 0,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 669000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 5332000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 56044000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 47829000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 54410000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 192072000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2008Q4I",
          "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": "2017-12-31",
          "val": 617744000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 711808000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 794652000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 803222000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 979082000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 1156654000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 882240000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 404399000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "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": "2017-12-31",
          "val": 1463743000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1621839000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2105429000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2207323000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 3152082000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 3834110000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 4032634000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 3055764000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 2665350000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009Q4I",
          "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": "2017-12-31",
          "val": 25474000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 16972000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 17221000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 24737000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 42668000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 50523000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 71865000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "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": "2017-12-31",
          "val": 1782000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 1376000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 2211000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2766000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 4893000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 6903000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 10232000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 11444000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2010Q4I",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -138225000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -170378000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -487771000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 14412000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -197396000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -50130000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 38922000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 73921000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 42476000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 42169000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 53890000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 53361000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 64902000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 68666000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 66780000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 57792000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 54398000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 57206000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "DepreciationDepletionAndAmortization",
      "taxonomy": "us-gaap",
      "label": "Depreciation, depletion and amortization",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Combined depreciation, depletion and amortization for the period. A noncash allocation of asset cost, not a measure of maintenance spending.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 159964000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 171641000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 205275000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 235805000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 279775000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 326842000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 288421000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 260665000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 253573000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 206316000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": -15992000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -11759000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 106461000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NonoperatingIncomeExpense",
      "taxonomy": "us-gaap",
      "label": "Nonoperating income or expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Total nonoperating income or expense, which can include interest, investment results and other items. A positive value is not operating profit.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -73702000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -71132000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 41156000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 129118000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -131389000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -20991000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -73276000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -54479000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -30209000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": -17681000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 0,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 0,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -176797000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 16644000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -117050000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -185000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 17688000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 57361000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 31867000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 62565000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 61295000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 58193000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 61047000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 65935000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 94205000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 83718000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 36504000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 33174000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 10315000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "IncomeTaxesPaidNet",
      "taxonomy": "us-gaap",
      "label": "Income taxes paid, net",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash income taxes paid net of refunds during the period. It differs from income tax expense and can reflect prior years and estimated payments.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 0,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 0,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 2000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1163000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 10000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -8128000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2691000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 6089000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ProceedsFromIssuanceOfCommonStock",
      "taxonomy": "us-gaap",
      "label": "Proceeds from issuing common stock",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash received from issuing common stock during the period. It is gross of costs only where the filer reports it so, and it does not include noncash issuances.",
      "observations": [
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 110710000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 110003000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 0,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 0,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 23707000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 880000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 4082000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "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": "2017-01-01",
          "end": "2017-12-31",
          "val": 18578000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -10624000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -20995000,
          "accn": "0001172139-18-000043",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-02-27",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -32163000,
          "accn": "0001172139-17-000041",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-02",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -14294000,
          "accn": "0001172139-16-000132",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-02",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 10511000,
          "accn": "0001172139-15-000046",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-02-27",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 27680000,
          "accn": "0001172139-14-000028",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-02-21",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 10021000,
          "accn": "0001193125-13-070731",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-22",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -3854000,
          "accn": "0001193125-12-074972",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-02-23",
          "frame": "CY2009",
          "unit": "USD"
        },
        {
          "start": "2008-01-01",
          "end": "2008-12-31",
          "val": 16047000,
          "accn": "0001193125-11-043180",
          "fy": 2010,
          "fp": "FY",
          "form": "10-K",
          "filed": "2011-02-23",
          "frame": "CY2008",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/1243607d4b918c03d594bb2801cb494ffca9dcc45df1b35c4ccb2269b1fb75cf.json.gz"
}
