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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. 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Restricted cash and longer-term investments may be reported separately.", "observations": [ { "end": "2025-12-31", "val": 42114000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "unit": "USD" }, { "end": "2024-12-31", "val": 123399000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024Q4I", "unit": "USD" }, { "end": "2023-12-31", "val": 59482000, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2023Q4I", "unit": "USD" }, { "end": "2022-12-31", "val": 36641000, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2022Q4I", "unit": "USD" }, { "end": "2021-12-31", "val": 781918000, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2021Q4I", "unit": "USD" }, { "end": "2020-12-31", "val": 574310000, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2020Q4I", "unit": "USD" }, { "end": "2019-12-31", "val": 241965000, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2019Q4I", "unit": "USD" }, { "end": "2018-12-31", "val": 43305000, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018Q4I", "unit": "USD" }, { "end": "2017-12-31", "val": 154353000, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2017Q4I", "unit": "USD" }, { "end": "2016-12-31", "val": 38197000, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2016Q4I", "unit": "USD" }, { "end": "2015-12-31", "val": 35427000, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2015Q4I", "unit": "USD" }, { "end": "2014-12-31", "val": 29174000, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2014Q4I", "unit": "USD" }, { "end": "2013-12-31", "val": 43702000, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2013Q4I", "unit": "USD" }, { "end": "2012-12-31", "val": 63582000, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2012Q4I", "unit": "USD" }, { "end": "2011-12-31", "val": 29291000, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2011Q4I", "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": 60502000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 47604000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 38176000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 47753000, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 48085000, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 38647000, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 45318000, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 36767000, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 28061000, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 31555000, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2016", "unit": "USD" }, { "start": "2015-01-01", "end": "2015-12-31", "val": 28418000, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2015", "unit": "USD" }, { "start": "2014-01-01", "end": "2014-12-31", "val": 26974000, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2014", "unit": "USD" }, { "start": "2013-01-01", "end": "2013-12-31", "val": 25931000, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2013", "unit": "USD" }, { "start": "2012-01-01", "end": "2012-12-31", "val": 26833000, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2012", "unit": "USD" }, { "start": "2011-01-01", "end": "2011-12-31", "val": 26777000, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD" }, { "start": "2010-01-01", "end": "2010-12-31", "val": 23316000, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2010", "unit": "USD" }, { "start": "2009-01-01", "end": "2009-12-31", "val": 15985000, "accn": "0000732417-12-000013", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-09", "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": 68809000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 55542000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 52840000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 56461000, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 85074000, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 8146000, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 39320000, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 47738000, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 45898000, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 28880000, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2016", "unit": "USD" }, { "start": "2015-01-01", "end": "2015-12-31", "val": 32279000, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2015", "unit": "USD" }, { "start": "2014-01-01", "end": "2014-12-31", "val": 33145000, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2014", "unit": "USD" }, { "start": "2013-01-01", "end": "2013-12-31", "val": 59798000, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2013", "unit": "USD" }, { "start": "2012-01-01", "end": "2012-12-31", "val": 25806000, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2012", "unit": "USD" }, { "start": "2011-01-01", "end": "2011-12-31", "val": 23107000, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD" }, { "start": "2010-01-01", "end": "2010-12-31", "val": 38726000, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2010", "unit": "USD" }, { "start": "2009-01-01", "end": "2009-12-31", "val": 25119000, "accn": "0000732417-12-000013", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-09", "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": 3670000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 4501000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 3027000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 1911000, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 1464000, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 1860000, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 3167000, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 2206000, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 2854000, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 7082000, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2016", "unit": "USD" }, { "start": "2015-01-01", "end": "2015-12-31", "val": 7199000, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2015", "unit": "USD" }, { "start": "2014-01-01", "end": "2014-12-31", "val": 1794000, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2014", "unit": "USD" }, { "start": "2013-01-01", "end": "2013-12-31", "val": 2002000, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2013", "unit": "USD" }, { "start": "2012-01-01", "end": "2012-12-31", "val": 3091000, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2012", "unit": "USD" }, { "start": "2011-01-01", "end": "2011-12-31", "val": 5940000, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD" }, { "start": "2010-01-01", "end": "2010-12-31", "val": 2957000, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2010", "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": -26365000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 198744000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 302000000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": -70128000, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 224760000, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 440586000, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 202571000, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 43947000, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 274169000, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 135386000, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2016", "unit": "USD" }, { "start": "2015-01-01", "end": "2015-12-31", "val": 128056000, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2015", "unit": "USD" }, { "start": "2014-01-01", "end": "2014-12-31", "val": 136402000, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2014", "unit": "USD" }, { "start": "2013-01-01", "end": "2013-12-31", "val": 44261000, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2013", "unit": "USD" }, { "start": "2012-01-01", "end": "2012-12-31", "val": 55896000, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2012", "unit": "USD" }, { "start": "2011-01-01", "end": "2011-12-31", "val": 58302000, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD" }, { "start": "2010-01-01", "end": "2010-12-31", "val": 76321000, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2010", "unit": "USD" }, { "start": "2009-01-01", "end": "2009-12-31", "val": 32968000, "accn": "0000732417-12-000013", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-09", "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. 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This balance is not cash available for distribution.", "observations": [ { "end": "2025-12-31", "val": 629068000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "unit": "USD" }, { "end": "2024-12-31", "val": 578882000, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024Q4I", "unit": "USD" }, { "end": "2023-12-31", "val": 541329000, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2023Q4I", "unit": "USD" }, { "end": "2022-12-31", "val": 512841000, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2022Q4I", "unit": "USD" }, { "end": "2021-12-31", "val": 474392000, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2021Q4I", "unit": "USD" }, { "end": "2020-12-31", "val": 439831000, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2020Q4I", "unit": "USD" }, { "end": "2019-12-31", "val": 409509000, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2019Q4I", "unit": "USD" }, { "end": "2018-12-31", "val": 371848000, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018Q4I", "unit": "USD" }, { "end": "2017-12-31", "val": 341558000, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2017Q4I", "unit": "USD" }, { "end": "2016-12-31", "val": 319982000, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2016Q4I", "unit": "USD" }, { "end": "2015-12-31", "val": 294487000, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2015Q4I", "unit": "USD" }, { "end": "2014-12-31", "val": 271924000, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2014Q4I", "unit": "USD" }, { "end": "2013-12-31", "val": 250370000, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2013Q4I", "unit": "USD" }, { "end": "2012-12-31", "val": 229625000, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2012Q4I", "unit": "USD" }, { "end": "2011-12-31", "val": 207790000, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2011Q4I", "unit": "USD" }, { "end": "2010-12-31", "val": 185412000, "accn": "0000732417-12-000013", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-09", "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. 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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": 8878124, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2025", "unit": "shares" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 9051117, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024", "unit": "shares" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 9177375, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2023", "unit": "shares" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 9269541, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2022", "unit": "shares" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 9310862, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2021", "unit": "shares" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 9372905, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2020", "unit": "shares" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 9359780, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2019", "unit": "shares" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 9370341, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2018", "unit": "shares" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 9334635, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "shares" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 9293534, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2016", "unit": "shares" }, { "start": "2015-01-01", "end": "2015-12-31", "val": 9349527, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2015", "unit": "shares" }, { "start": "2014-01-01", "end": "2014-12-31", "val": 9392928, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2014", "unit": "shares" }, { "start": "2013-01-01", "end": "2013-12-31", "val": 9427706, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2013", "unit": "shares" }, { "start": "2012-01-01", "end": "2012-12-31", "val": 4721277, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2012", "unit": "shares" }, { "start": "2011-01-01", "end": "2011-12-31", "val": 4458522, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "shares" }, { "start": "2010-01-01", "end": "2010-12-31", "val": 4418258, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2010", "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": 6.82, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2025", "unit": "USD/shares" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 5.26, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024", "unit": "USD/shares" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 4.16, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2023", "unit": "USD/shares" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 5.15, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2022", "unit": "USD/shares" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 5.16, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2021", "unit": "USD/shares" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 4.12, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2020", "unit": "USD/shares" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 4.85, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2019", "unit": "USD/shares" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 3.93, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2018", "unit": "USD/shares" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 3.01, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD/shares" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 3.4, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2016", "unit": "USD/shares" }, { "start": "2015-01-01", "end": "2015-12-31", "val": 3.04, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2015", "unit": "USD/shares" }, { "start": "2014-01-01", "end": "2014-12-31", "val": 2.88, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2014", "unit": "USD/shares" }, { "start": "2013-01-01", "end": "2013-12-31", "val": 2.76, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2013", "unit": "USD/shares" }, { "start": "2012-01-01", "end": "2012-12-31", "val": 5.69, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2012", "unit": "USD/shares" }, { "start": "2011-01-01", "end": "2011-12-31", "val": 6.02, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD/shares" }, { "start": "2010-01-01", "end": "2010-12-31", "val": 5.29, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2010", "unit": "USD/shares" }, { "start": "2009-01-01", "end": "2009-12-31", "val": 3.61, "accn": "0000732417-12-000013", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-09", "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": 6.81, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2025", "unit": "USD/shares" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 5.26, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2024", "unit": "USD/shares" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 4.16, "accn": "0000732417-26-000022", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-18", "frame": "CY2023", "unit": "USD/shares" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 5.15, "accn": "0000732417-25-000015", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-14", "frame": "CY2022", "unit": "USD/shares" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 5.16, "accn": "0000732417-24-000009", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-03-05", "frame": "CY2021", "unit": "USD/shares" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 4.12, "accn": "0000732417-23-000013", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-03", "frame": "CY2020", "unit": "USD/shares" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 4.85, "accn": "0000732417-22-000007", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-04", "frame": "CY2019", "unit": "USD/shares" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 3.92, "accn": "0000732417-21-000007", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-05", "frame": "CY2018", "unit": "USD/shares" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 3.01, "accn": "0000732417-20-000008", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD/shares" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 3.4, "accn": "0000732417-19-000009", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-05", "frame": "CY2016", "unit": "USD/shares" }, { "start": "2015-01-01", "end": "2015-12-31", "val": 3.04, "accn": "0000732417-18-000014", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-05", "frame": "CY2015", "unit": "USD/shares" }, { "start": "2014-01-01", "end": "2014-12-31", "val": 2.87, "accn": "0000732417-17-000024", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-03", "frame": "CY2014", "unit": "USD/shares" }, { "start": "2013-01-01", "end": "2013-12-31", "val": 2.75, "accn": "0000732417-16-000056", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-09", "frame": "CY2013", "unit": "USD/shares" }, { "start": "2012-01-01", "end": "2012-12-31", "val": 5.68, "accn": "0000732417-15-000016", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-11", "frame": "CY2012", "unit": "USD/shares" }, { "start": "2011-01-01", "end": "2011-12-31", "val": 6.01, "accn": "0001140361-14-012100", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD/shares" }, { "start": "2010-01-01", "end": "2010-12-31", "val": 5.28, "accn": "0001140361-13-012176", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-13", "frame": "CY2010", "unit": "USD/shares" }, { "start": "2009-01-01", "end": "2009-12-31", "val": 3.6, "accn": "0000732417-12-000013", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-09", "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. 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