{
  "schema": "canli.company-reference.v1",
  "cik": "0000101984",
  "name": "UNIVERSAL ELECTRONICS INC.",
  "selection_policy": "extended-v22",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0000101984.json",
  "source_sha256": "7a73e02f8b7c9548fdb58d3ce82597cfbca2c5e0bb11c0500fd3a816b423ca0b",
  "fetched_at": "2026-09-19T14:53:57.706Z",
  "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": "2025-12-31",
          "val": 273997000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 323354000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 355872000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 504163000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 510348000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 510290000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 564159000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 555596000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 608430000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 521036000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 495220000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 463070000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 423733000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 379324000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 369488000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 372671000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Liabilities",
      "taxonomy": "us-gaap",
      "label": "Total liabilities",
      "kind": "instant",
      "meaning": "Recognized obligations at the reporting date. The definition and scope differ from interest-bearing debt.",
      "observations": [
        {
          "end": "2025-12-31",
          "val": 127813000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 170249000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 176952000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 235757000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 234399000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 196989000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 289760000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 292636000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 354881000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 240526000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 237312000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 147449000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 132463000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 128674000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 139499000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 161467000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "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": "2025-12-31",
          "val": 146184000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 153105000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 178920000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 268406000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 275949000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 313301000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 274399000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 262960000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 257633000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 280510000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 257609000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 315621000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 291270000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 250650000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 229989000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 211204000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 169730000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 153353000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2008Q4I",
          "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": "2025-12-31",
          "val": 32306000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 26783000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 42751000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 66740000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 60813000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 57153000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 74302000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 53207000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 62438000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 50611000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 52966000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 112521000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 76174000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 44593000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 29372000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 54249000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 29016000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 75238000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2008Q4I",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": -18599000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -24029000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -98238000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 407000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 5301000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 38572000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 3630000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 11924000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -10323000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 20354000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 29174000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 32534000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 22963000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 16553000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 19946000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 15081000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 14675000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": 23626000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 14822000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 25190000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 10926000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 40283000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 73392000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 85257000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 12855000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 9165000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 49543000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 26094000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 63473000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 30694000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 43543000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 14800000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 38139000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 23987000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsToAcquirePropertyPlantAndEquipment",
      "taxonomy": "us-gaap",
      "label": "Capital expenditure payments",
      "kind": "duration",
      "meaning": "Cash payments to acquire property, plant and equipment. This taxonomy concept does not capture every form of investment or acquisition.",
      "observations": [
        {
          "start": "2025-01-01",
          "end": "2025-12-31",
          "val": 3875000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 4572000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 8116000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 14006000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 12586000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 16862000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 21313000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 20142000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 40384000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 40651000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 32989000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 16566000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 10355000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 10463000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 13630000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 8440000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 6171000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "RevenueFromContractWithCustomerExcludingAssessedTax",
      "taxonomy": "us-gaap",
      "label": "Contract revenue excluding tax",
      "kind": "duration",
      "meaning": "Revenue from customer contracts excluding assessed taxes under this specific taxonomy concept. It is not automatically comparable to older revenue tags.",
      "observations": [
        {
          "start": "2025-01-01",
          "end": "2025-12-31",
          "val": 368288000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 394879000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 420457000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 542751000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 601602000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 614680000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 753477000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 680241000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 695790000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 651371000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "NetCashProvidedByUsedInFinancingActivities",
      "taxonomy": "us-gaap",
      "label": "Financing cash flow",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Net cash from financing activities, including borrowing, repayments and transactions with owners. A positive amount does not establish operating profitability.",
      "observations": [
        {
          "start": "2025-01-01",
          "end": "2025-12-31",
          "val": -16658000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -19764000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -34779000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 20501000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -22026000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -65964000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -39231000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -53318000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 50370000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -4446000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -35142000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -8046000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 10038000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -17578000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -26269000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 23275000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -4222000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": -6751000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -8428000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -13877000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -21208000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -17041000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -23734000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -23968000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 23575000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -51227000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -37718000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -47649000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -18419000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -11674000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -11603000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -14694000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -34843000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -66091000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-12-31",
          "val": 189832000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 208431000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 232460000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 330698000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 330291000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 324990000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 286418000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 282788000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-01-01",
          "val": 270864000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 266780000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 275594000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 255240000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 226066000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 193532000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 170569000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 154016000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 134070000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": 13172000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "shares"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 12959000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 12855000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 12703000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 13465000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 13893000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 13879000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 13948000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 14351000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 14465000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 15248000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 15781000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 15248000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 14952000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 14912000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 13764000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 13667000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": 13172000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "shares"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 12959000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 12855000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 12779000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 13742000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 14166000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 14109000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 14060000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 14351000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 14764000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 15542000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 16152000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 15601000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 15110000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 15213000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 14106000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 13971000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": -1.41,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD/shares"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -1.85,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD/shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -7.64,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 0.03,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 0.39,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 2.78,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 0.26,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 0.85,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -0.72,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1.41,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1.91,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2.06,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1.51,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1.11,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1.34,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1.1,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1.07,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": -1.41,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD/shares"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -1.85,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD/shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -7.64,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 0.03,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 0.39,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 2.72,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 0.26,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 0.85,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -0.72,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1.38,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1.88,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2.01,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1.47,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD/shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 1.1,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1.31,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD/shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 1.07,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1.05,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": 6639000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 5431000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 5984000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 10986000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 10779000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 5333000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 6772000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 14242000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 17611000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 4804000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 6802000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 7917000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 6073000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 8085000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 5285000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 6777000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 7502000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-12-31",
          "val": 25819000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025Q4I",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 32895000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 41931000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 62791000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 74647000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 87285000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 90732000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 95840000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 110962000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 105351000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 90015000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 76135000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 75570000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 77706000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 80449000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 78097000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ShareBasedCompensation",
      "taxonomy": "us-gaap",
      "label": "Share-based compensation expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Reported noncash expense for share-based payment arrangements. Noncash treatment does not mean the awards have no economic cost to shareholders.",
      "observations": [
        {
          "start": "2025-01-01",
          "end": "2025-12-31",
          "val": 5098000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 6700000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 8809000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 10013000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 9969000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 9122000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 8845000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 8820000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 11943000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 10324000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 7913000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 6444000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 5342000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 4575000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 4511000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 4966000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 4312000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-01-01",
          "end": "2025-12-31",
          "val": -6404000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": -15297000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -85301000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 14548000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 23253000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 37267000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 15315000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -1665000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 10670000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 25397000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 35919000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 41280000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 32154000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 26202000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 26576000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 21301000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 21947000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "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": "2025-12-31",
          "val": 205119000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 242494000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 258851000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 338040000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 337146000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 326843000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 378752000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 380453000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 407297000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 324158000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 315324000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 319965000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 278466000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 229163000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 212063000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 214433000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "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": "2025-12-31",
          "val": 119310000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 158291000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 161148000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 216473000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 216787000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 179510000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 266456000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 279856000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-01-01",
          "val": 337035000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 332935000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 215867000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 215124000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 136365000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 119918000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 115675000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 127302000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 148830000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "AccountsPayableCurrent",
      "taxonomy": "us-gaap",
      "label": "Current accounts payable",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Current amounts owed to suppliers for goods and services received. This is one component of current liabilities, not all accrued obligations.",
      "observations": [
        {
          "end": "2025-12-31",
          "val": 48945000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 72031000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 57033000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 71373000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 92707000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 83229000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 102588000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 107282000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 119165000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 97157000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 93843000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 69991000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 58498000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 59831000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 55430000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 56086000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "Goodwill",
      "taxonomy": "us-gaap",
      "label": "Goodwill carrying amount",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Recognized goodwill remaining after accumulated impairment. It arises from business combinations and does not measure the current value of the company’s brand.",
      "observations": [
        {
          "end": "2023-12-31",
          "val": 0,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 49085000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 48463000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 48614000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 48447000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 48485000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 48651000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 43052000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 43116000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 30739000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 31000000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 30890000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 30820000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 30877000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "FiniteLivedIntangibleAssetsNet",
      "taxonomy": "us-gaap",
      "label": "Net finite-lived intangible assets",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Finite-lived intangible assets after amortization. This excludes goodwill and should not be combined with indefinite-lived intangible assets without checking scope.",
      "observations": [
        {
          "end": "2025-12-31",
          "val": 21968000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 24038000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 25349000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 24470000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 20169000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 19710000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 19830000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 24370000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 29041000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 28549000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 32926000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 24614000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 26963000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 29835000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 32814000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 35994000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "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": "2025-12-31",
          "val": 70404000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 91527000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 104835000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 106455000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 120631000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 120655000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 128773000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 131922000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 140673000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 119522000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 117761000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 90372000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 92982000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 88738000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 82184000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "PaymentsForRepurchaseOfCommonStock",
      "taxonomy": "us-gaap",
      "label": "Common-stock repurchase payments",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Cash paid to reacquire common stock during the period. This is not an authorization limit or a direct measure of the net change in share count.",
      "observations": [
        {
          "start": "2025-01-01",
          "end": "2025-12-31",
          "val": 3086000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 1957000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 1779000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 13035000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 59664000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 17678000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1928000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 13824000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 39085000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 12647000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 89395000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 16168000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 3607000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 3451000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 9785000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 10145000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 7747000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InventoryNet",
      "taxonomy": "us-gaap",
      "label": "Net inventory",
      "kind": "instant",
      "unitKind": "money",
      "meaning": "Inventory carrying amount after applicable valuation and LIFO reserves. It does not establish realizable selling proceeds or inventory turnover without other inputs.",
      "observations": [
        {
          "end": "2025-12-31",
          "val": 77793000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 79355000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 88273000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 140181000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 134469000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 120430000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 145135000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 144350000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-01-01",
          "val": 138759000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 162589000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 129879000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 122366000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 97474000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 96309000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 84381000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 90904000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 65402000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2010Q4I",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "GrossProfit",
      "taxonomy": "us-gaap",
      "label": "Gross profit",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Revenue less the costs directly attributed to the goods or services sold. It precedes other operating expenses and is not net income.",
      "observations": [
        {
          "start": "2025-01-01",
          "end": "2025-12-31",
          "val": 106461000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 113994000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 97560000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 152292000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 173016000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 176256000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 170203000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 141804000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 165707000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 164124000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 166749000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 166900000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 151462000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 133437000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 130061000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 103849000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 101612000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "SellingGeneralAndAdministrativeExpense",
      "taxonomy": "us-gaap",
      "label": "Selling, general and administrative expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Selling and general administrative costs reported under this concept. It is an expense category, not a substitute for total operating expenses.",
      "observations": [
        {
          "start": "2025-01-01",
          "end": "2025-12-31",
          "val": 85375000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 91811000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 98490000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 105292000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 118846000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 107539000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 125476000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 119654000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 127476000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 114384000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 112689000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 108645000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 102861000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 93083000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 91218000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 71839000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 70974000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "ResearchAndDevelopmentExpense",
      "taxonomy": "us-gaap",
      "label": "Research and development expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Research and development costs recognized as expense. Capitalization policies and acquired projects can make this differ from total cash invested in development.",
      "observations": [
        {
          "start": "2025-01-01",
          "end": "2025-12-31",
          "val": 26269000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 29723000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 31281000,
          "accn": "0000101984-26-000039",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-12",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 32452000,
          "accn": "0000101984-25-000038",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-11",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 30917000,
          "accn": "0000101984-24-000048",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-14",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 31450000,
          "accn": "0000101984-23-000012",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-08",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 29412000,
          "accn": "0000101984-22-000011",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-04",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 23815000,
          "accn": "0000101984-21-000009",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-05",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 21416000,
          "accn": "0000101984-20-000009",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-16",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 19850000,
          "accn": "0000101984-19-000012",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-15",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 18141000,
          "accn": "0000101984-18-000008",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-13",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 16975000,
          "accn": "0000101984-17-000007",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-09",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 16447000,
          "accn": "0000101984-16-000062",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 14152000,
          "accn": "0000101984-15-000011",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-06",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 12267000,
          "accn": "0000101984-14-000014",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 10709000,
          "accn": "0001445305-13-000608",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-03-14",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 8691000,
          "accn": "0001193125-12-114613",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-14",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/7a73e02f8b7c9548fdb58d3ce82597cfbca2c5e0bb11c0500fd3a816b423ca0b.json.gz"
}
