{
  "schema": "canli.company-reference.v1",
  "cik": "0000750686",
  "name": "CAMDEN NATIONAL CORP",
  "selection_policy": "extended-v22",
  "source_url": "https://data.sec.gov/api/xbrl/companyfacts/CIK0000750686.json",
  "source_sha256": "05f5b1fb33a942b79ebff22a5a1ea27627480edfd41936110e65a9bb7674ac62",
  "fetched_at": "2026-09-19T15:01:59.501Z",
  "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": 6974584000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 5805138000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 5714506000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 5671850000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 5500356000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 4898745000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 4429521000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 4297435000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 4065398000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 3864230000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3709344000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2789853000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2603829000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2564757000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2302720000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2306007000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 6278026000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 5273907000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 5219442000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 5220572000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 4959062000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 4369431000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 3956106000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 3861610000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 3661985000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 3472683000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 3346154000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 2544744000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 2372733000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 2330942000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 2083844000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 2100012000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 696558000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 531231000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 495064000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 451278000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 541294000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 529314000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 473415000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 435825000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 403413000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 391547000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 363190000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 245109000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 231096000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 233815000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 218876000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 205995000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 190561000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 166400000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": "2018-12-31",
          "val": 66999000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 102971000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 87707000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 79488000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 60813000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 51355000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 58290000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 39325000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 31009000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2010Q4I",
          "unit": "USD"
        },
        {
          "end": "2009-12-31",
          "val": 29772000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2009Q4I",
          "unit": "USD"
        },
        {
          "end": "2008-12-31",
          "val": 35195000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 65160000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 53004000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 43383000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 61439000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 69014000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 59486000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 57203000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 53071000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 28476000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 40067000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 20952000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 24570000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 22783000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 23428000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 26177000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 24766000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 22773000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 63912000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 60933000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 67508000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 105183000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 142716000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 18230000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 32871000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 64334000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 58334000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 57418000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 15918000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 29886000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 29732000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 42329000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 33423000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 35808000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 22413000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 5708000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 5576000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 2622000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 2183000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 1852000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 2926000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 4267000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 5021000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 2844000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1671000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 3189000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 1316000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 1490000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 3403000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1516000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 2459000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 2493000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 41739000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 35688000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 33567000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 33274000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 31954000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 27736000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 28330000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 26819000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "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": -124969000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 23897000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -36102000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 237341000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 581228000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 346360000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 31601000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 176471000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 169061000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 118754000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 57501000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 150084000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 130244000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": -55502000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": -39909000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 45091000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": -137498000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": -56414000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 30329000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": -7029000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": -487722000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": -649093000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": -294452000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": -55835000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": -276777000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": -212131000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": -167953000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": -54744000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": -170512000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": -166911000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 32138000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 14802000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": -79662000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 109662000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 545149000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 509452000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 481014000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 462164000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 424412000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 377502000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 340580000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 302030000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 266723000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 249415000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 222329000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 211979000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 195660000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 181151000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 165377000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 150730000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 16898760,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "shares"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 14579276,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 14563380,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 14644170,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 14903855,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 14985235,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 15407289,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 15571387,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 15509665,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 15422160,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 12031294,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 11176468,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 7634455,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 7646861,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 7672126,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 7655668,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 7642492,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 16977077,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "shares"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 14633803,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 14609345,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 14701010,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 14971578,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 15023767,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 15453022,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 15626303,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 15588347,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 15504239,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 12074579,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 11205888,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 7653270,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "shares"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 7661273,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 7679895,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "shares"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 7663498,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 7653973,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 3.86,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD/shares"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 3.63,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD/shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 2.98,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 4.18,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 4.62,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 3.96,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 3.7,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 3.4,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 1.83,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 2.59,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1.73,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2.19,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 2.98,
          "accn": "0000750686-16-000254",
          "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": 3.06,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 3.41,
          "accn": "0000750686-14-000047",
          "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": 3.23,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 2.98,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 3.84,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD/shares"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 3.62,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD/shares"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 2.97,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD/shares"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 4.17,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD/shares"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 4.6,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD/shares"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 3.95,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD/shares"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 3.69,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD/shares"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 3.39,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD/shares"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 1.82,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD/shares"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 2.57,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD/shares"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 1.73,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD/shares"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 2.19,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD/shares"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 2.97,
          "accn": "0000750686-16-000254",
          "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": 3.05,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD/shares"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 3.4,
          "accn": "0000750686-14-000047",
          "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": 3.23,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD/shares"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 2.97,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 13495000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 12456000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 10453000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 15608000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 17627000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 14910000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 14376000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 12706000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 33878000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 17472000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 9907000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 11440000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 12132000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 10882000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 11781000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 11113000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 10443000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 51349000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 37052000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 35049000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 36022000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 37775000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 39884000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 41836000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 42495000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 41891000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 42873000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 45959000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 23886000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 25727000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 28059000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 24113000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 25044000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "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": 3419000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 2902000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 2793000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 2553000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 2381000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 1785000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 1885000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 1688000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 1469000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 1997000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 836000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 599000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 596000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 538000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 1025000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 809000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 1072000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    },
    {
      "tag": "InterestExpense",
      "taxonomy": "us-gaap",
      "label": "Interest expense",
      "kind": "duration",
      "unitKind": "money",
      "meaning": "Borrowing costs recognized as interest expense. This is distinct from cash interest paid and may not include every capitalized borrowing cost.",
      "observations": [
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 93983000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 25094000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 11048000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 20893000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 40888000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 30984000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 20804000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 16554000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 12692000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 12128000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 12742000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 17202000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 23153000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 30217000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 40320000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "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": "2025-12-31",
          "val": 151505000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 94697000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 94697000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 94697000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 94697000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 94697000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 94697000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 94697000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 94697000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 94697000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 95657000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 44806000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014Q4I",
          "unit": "USD"
        },
        {
          "end": "2013-12-31",
          "val": 44806000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013Q4I",
          "unit": "USD"
        },
        {
          "end": "2012-12-31",
          "val": 47636000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012Q4I",
          "unit": "USD"
        },
        {
          "end": "2011-12-31",
          "val": 41730000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011Q4I",
          "unit": "USD"
        },
        {
          "end": "2010-12-31",
          "val": 41780000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "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": 42580000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025Q4I",
          "unit": "USD"
        },
        {
          "end": "2024-12-31",
          "val": 415000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2024Q4I",
          "unit": "USD"
        },
        {
          "end": "2023-12-31",
          "val": 971000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2023Q4I",
          "unit": "USD"
        },
        {
          "end": "2022-12-31",
          "val": 1563000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2022Q4I",
          "unit": "USD"
        },
        {
          "end": "2021-12-31",
          "val": 2188000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2021Q4I",
          "unit": "USD"
        },
        {
          "end": "2020-12-31",
          "val": 2843000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2020Q4I",
          "unit": "USD"
        },
        {
          "end": "2019-12-31",
          "val": 3525000,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2019Q4I",
          "unit": "USD"
        },
        {
          "end": "2018-12-31",
          "val": 4230000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2018Q4I",
          "unit": "USD"
        },
        {
          "end": "2017-12-31",
          "val": 4955000,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2017Q4I",
          "unit": "USD"
        },
        {
          "end": "2016-12-31",
          "val": 6764000,
          "accn": "0000750686-18-000057",
          "fy": 2017,
          "fp": "FY",
          "form": "10-K",
          "filed": "2018-03-09",
          "frame": "CY2016Q4I",
          "unit": "USD"
        },
        {
          "end": "2015-12-31",
          "val": 8667000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2015Q4I",
          "unit": "USD"
        },
        {
          "end": "2014-12-31",
          "val": 3365000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014Q4I",
          "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": 0,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2025",
          "unit": "USD"
        },
        {
          "start": "2024-01-01",
          "end": "2024-12-31",
          "val": 1609000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2024",
          "unit": "USD"
        },
        {
          "start": "2023-01-01",
          "end": "2023-12-31",
          "val": 2000000,
          "accn": "0000750686-26-000010",
          "fy": 2025,
          "fp": "FY",
          "form": "10-K",
          "filed": "2026-03-06",
          "frame": "CY2023",
          "unit": "USD"
        },
        {
          "start": "2022-01-01",
          "end": "2022-12-31",
          "val": 10240000,
          "accn": "0000750686-25-000044",
          "fy": 2024,
          "fp": "FY",
          "form": "10-K",
          "filed": "2025-03-07",
          "frame": "CY2022",
          "unit": "USD"
        },
        {
          "start": "2021-01-01",
          "end": "2021-12-31",
          "val": 10090000,
          "accn": "0000750686-24-000025",
          "fy": 2023,
          "fp": "FY",
          "form": "10-K",
          "filed": "2024-03-08",
          "frame": "CY2021",
          "unit": "USD"
        },
        {
          "start": "2020-01-01",
          "end": "2020-12-31",
          "val": 9689000,
          "accn": "0000750686-23-000033",
          "fy": 2022,
          "fp": "FY",
          "form": "10-K",
          "filed": "2023-03-10",
          "frame": "CY2020",
          "unit": "USD"
        },
        {
          "start": "2019-01-01",
          "end": "2019-12-31",
          "val": 20795000,
          "accn": "0000750686-22-000034",
          "fy": 2021,
          "fp": "FY",
          "form": "10-K",
          "filed": "2022-03-11",
          "frame": "CY2019",
          "unit": "USD"
        },
        {
          "start": "2018-01-01",
          "end": "2018-12-31",
          "val": 27000,
          "accn": "0000750686-21-000026",
          "fy": 2020,
          "fp": "FY",
          "form": "10-K",
          "filed": "2021-03-15",
          "frame": "CY2018",
          "unit": "USD"
        },
        {
          "start": "2017-01-01",
          "end": "2017-12-31",
          "val": 0,
          "accn": "0000750686-20-000044",
          "fy": 2019,
          "fp": "FY",
          "form": "10-K",
          "filed": "2020-03-11",
          "frame": "CY2017",
          "unit": "USD"
        },
        {
          "start": "2016-01-01",
          "end": "2016-12-31",
          "val": 0,
          "accn": "0000750686-19-000052",
          "fy": 2018,
          "fp": "FY",
          "form": "10-K",
          "filed": "2019-03-13",
          "frame": "CY2016",
          "unit": "USD"
        },
        {
          "start": "2015-01-01",
          "end": "2015-12-31",
          "val": 0,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2015",
          "unit": "USD"
        },
        {
          "start": "2014-01-01",
          "end": "2014-12-31",
          "val": 7475000,
          "accn": "0000750686-17-000057",
          "fy": 2016,
          "fp": "FY",
          "form": "10-K",
          "filed": "2017-03-07",
          "frame": "CY2014",
          "unit": "USD"
        },
        {
          "start": "2013-01-01",
          "end": "2013-12-31",
          "val": 2460000,
          "accn": "0000750686-16-000254",
          "fy": 2015,
          "fp": "FY",
          "form": "10-K",
          "filed": "2016-03-11",
          "frame": "CY2013",
          "unit": "USD"
        },
        {
          "start": "2012-01-01",
          "end": "2012-12-31",
          "val": 2097000,
          "accn": "0000750686-15-000019",
          "fy": 2014,
          "fp": "FY",
          "form": "10-K",
          "filed": "2015-03-10",
          "frame": "CY2012",
          "unit": "USD"
        },
        {
          "start": "2011-01-01",
          "end": "2011-12-31",
          "val": 389000,
          "accn": "0000750686-14-000047",
          "fy": 2013,
          "fp": "FY",
          "form": "10-K",
          "filed": "2014-03-12",
          "frame": "CY2011",
          "unit": "USD"
        },
        {
          "start": "2010-01-01",
          "end": "2010-12-31",
          "val": 49000,
          "accn": "0001144204-13-012090",
          "fy": 2012,
          "fp": "FY",
          "form": "10-K",
          "filed": "2013-02-28",
          "frame": "CY2010",
          "unit": "USD"
        },
        {
          "start": "2009-01-01",
          "end": "2009-12-31",
          "val": 55000,
          "accn": "0001144204-12-012580",
          "fy": 2011,
          "fp": "FY",
          "form": "10-K",
          "filed": "2012-03-02",
          "frame": "CY2009",
          "unit": "USD"
        }
      ]
    }
  ],
  "source_snapshot": "/company-data/sources/05f5b1fb33a942b79ebff22a5a1ea27627480edfd41936110e65a9bb7674ac62.json.gz"
}
