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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": 57606000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "unit": "USD" }, { "end": "2024-12-31", "val": 16098000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024Q4I", "unit": "USD" }, { "end": "2023-12-31", "val": 1851000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023Q4I", "unit": "USD" }, { "end": "2022-12-31", "val": 1440000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022Q4I", "unit": "USD" }, { "end": "2021-12-31", "val": 2021000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021Q4I", "unit": "USD" }, { "end": "2020-12-31", "val": 236000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020Q4I", "unit": "USD" }, { "end": "2019-12-31", "val": 626000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019Q4I", "unit": "USD" }, { "end": "2018-12-31", "val": 2220000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018Q4I", "unit": "USD" }, { "end": "2017-12-31", "val": 14706, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2017Q4I", "unit": "USD" }, { "end": "2016-12-31", "val": 62873, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2016Q4I", "unit": "USD" }, { "end": "2015-12-31", "val": 391424, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2015Q4I", "unit": "USD" }, { "end": "2015-01-03", "val": 26623, "accn": "0000095953-18-000031", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-13", "frame": "CY2014Q4I", "unit": "USD" }, { "end": "2013-12-28", "val": 1773743, "accn": "0000095953-17-000027", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-14", "frame": "CY2013Q4I", "unit": "USD" }, { "end": "2012-12-29", "val": 1085261, "accn": "0000095953-16-000165", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-30", "frame": "CY2012Q4I", "unit": "USD" }, { "end": "2011-12-31", "val": 110138, "accn": "0000095953-15-000041", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-17", "frame": "CY2011Q4I", "unit": "USD" }, { "end": "2011-01-01", "val": 108902, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "frame": "CY2010Q4I", "unit": "USD" }, { "end": "2010-01-02", "val": 108902, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2009Q4I", "unit": "USD" }, { "end": "2009-01-03", "val": 97215, "accn": "0000095953-12-000007", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-14", "frame": "CY2008Q4I", "unit": "USD" } ] }, { "tag": "NetIncomeLoss", "taxonomy": "us-gaap", "label": "Net income or loss", "kind": "duration", "meaning": "Reported profit or loss for the period. Check the filing for attribution, exceptional items and discontinued operations before comparing companies.", "observations": [ { "start": "2025-01-01", "end": "2025-12-31", "val": 867000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": -13598000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": -26629000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 22066000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 20245000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": -27267000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": -3036000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 13097000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 1341000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": -7093301, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2016", "unit": "USD" }, { "start": "2015-01-04", "end": "2015-12-31", "val": -11520336, "accn": "0000095953-18-000031", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-13", "frame": "CY2015", "unit": "USD" }, { "start": "2013-12-29", "end": "2015-01-03", "val": 5462263, "accn": "0000095953-17-000027", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-14", "frame": "CY2014", "unit": "USD" }, { "start": "2012-12-30", "end": "2013-12-28", "val": 1760564, "accn": "0000095953-16-000165", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-30", "frame": "CY2013", "unit": "USD" }, { "start": "2012-01-01", "end": "2012-12-29", "val": 4234912, "accn": "0000095953-15-000041", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-17", "frame": "CY2012", "unit": "USD" }, { "start": "2011-01-02", "end": "2011-12-31", "val": 5797160, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD" }, { "start": "2010-01-03", "end": "2011-01-01", "val": 4033823, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "frame": "CY2010", "unit": "USD" }, { "start": "2009-01-04", "end": "2010-01-02", "val": 214516, "accn": "0000095953-12-000007", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-14", "frame": "CY2009", "unit": "USD" } ] }, { "tag": "NetCashProvidedByUsedInOperatingActivities", "taxonomy": "us-gaap", "label": "Operating cash flow", "kind": "duration", "meaning": "Cash generated or used by operating activities. Working-capital timing can make this differ substantially from reported income.", "observations": [ { "start": "2025-01-01", "end": "2025-12-31", "val": -519000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 14681000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 23078000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 5577000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 19055000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 17978000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 28640000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": -21221000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 2235000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 1511984, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2016", "unit": "USD" }, { "start": "2015-01-04", "end": "2015-12-31", "val": 16526999, "accn": "0000095953-18-000031", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-13", "frame": "CY2015", "unit": "USD" }, { "start": "2013-12-29", "end": "2015-01-03", "val": 28889025, "accn": "0000095953-17-000027", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-14", "frame": "CY2014", "unit": "USD" }, { "start": "2012-12-30", "end": "2013-12-28", "val": -5541798, "accn": "0000095953-16-000165", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-30", "frame": "CY2013", "unit": "USD" }, { "start": "2012-01-01", "end": "2012-12-29", "val": 1634863, "accn": "0000095953-15-000041", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-17", "frame": "CY2012", "unit": "USD" }, { "start": "2011-01-02", "end": "2011-12-31", "val": -3857780, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD" }, { "start": "2010-01-03", "end": "2011-01-01", "val": -6047943, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "frame": "CY2010", "unit": "USD" }, { "start": "2009-01-04", "end": "2010-01-02", "val": 20188531, "accn": "0000095953-12-000007", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-14", "frame": "CY2009", "unit": "USD" } ] }, { "tag": "PaymentsToAcquirePropertyPlantAndEquipment", "taxonomy": "us-gaap", "label": "Capital expenditure payments", "kind": "duration", "meaning": "Cash payments to acquire property, plant and equipment. This taxonomy concept does not capture every form of investment or acquisition.", "observations": [ { "start": "2025-01-01", "end": "2025-12-31", "val": 1544000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 1120000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 2885000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 3394000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 1497000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 3748000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 4537000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 7355000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 5279000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 3044411, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2016", "unit": "USD" }, { "start": "2015-01-04", "end": "2015-12-31", "val": 10905230, "accn": "0000095953-18-000031", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-13", "frame": "CY2015", "unit": "USD" }, { "start": "2013-12-29", "end": "2015-01-03", "val": 8065992, "accn": "0000095953-17-000027", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-14", "frame": "CY2014", "unit": "USD" }, { "start": "2012-12-30", "end": "2013-12-28", "val": 5648290, "accn": "0000095953-16-000165", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-30", "frame": "CY2013", "unit": "USD" }, { "start": "2012-01-01", "end": "2012-12-29", "val": 4542150, "accn": "0000095953-15-000041", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-17", "frame": "CY2012", "unit": "USD" }, { "start": "2011-01-02", "end": "2011-12-31", "val": 3185129, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD" }, { "start": "2010-01-03", "end": "2011-01-01", "val": 5095254, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "frame": "CY2010", "unit": "USD" }, { "start": "2009-01-04", "end": "2010-01-02", "val": 1892195, "accn": "0000095953-12-000007", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-14", "frame": "CY2009", "unit": "USD" } ] }, { "tag": "RevenueFromContractWithCustomerExcludingAssessedTax", "taxonomy": "us-gaap", "label": "Contract revenue excluding tax", "kind": "duration", "meaning": "Revenue from customer contracts excluding assessed taxes under this specific taxonomy concept. It is not automatically comparable to older revenue tags.", "observations": [ { "start": "2025-01-01", "end": "2025-12-31", "val": 74942000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 80763000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 193179000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 261993000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 334715000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 256000000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 305168000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 280841000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 201148000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 138565782, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2016", "unit": "USD" } ] }, { "tag": "NetCashProvidedByUsedInFinancingActivities", "taxonomy": "us-gaap", "label": "Financing cash flow", "kind": "duration", "unitKind": "money", "meaning": "Net cash from financing activities, including borrowing, repayments and transactions with owners. 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This differs from capital expenditure payments alone.", "observations": [ { "start": "2025-01-01", "end": "2025-12-31", "val": 50981000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2025", "unit": "USD" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 905000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024", "unit": "USD" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 50501000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023", "unit": "USD" }, { "start": "2022-01-01", "end": "2022-12-31", "val": -4975000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022", "unit": "USD" }, { "start": "2021-01-01", "end": "2021-12-31", "val": -32661000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021", "unit": "USD" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 994000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020", "unit": "USD" }, { "start": "2019-01-01", "end": "2019-12-31", "val": -25695000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019", "unit": "USD" }, { "start": "2018-01-01", "end": "2018-12-31", "val": -22703000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018", "unit": "USD" }, { "start": "2017-01-01", "end": "2017-12-31", "val": -17400000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "USD" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 17673234, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2016", "unit": "USD" }, { "start": "2015-01-04", "end": "2015-12-31", "val": -8944164, "accn": "0000095953-18-000031", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-13", "frame": "CY2015", "unit": "USD" }, { "start": "2013-12-29", "end": "2015-01-03", "val": -36396359, "accn": "0000095953-17-000027", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-14", "frame": "CY2014", "unit": "USD" }, { "start": "2012-12-30", "end": "2013-12-28", "val": -9451896, "accn": "0000095953-16-000165", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-30", "frame": "CY2013", "unit": "USD" }, { "start": "2012-01-01", "end": "2012-12-29", "val": -30357827, "accn": "0000095953-15-000041", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-17", "frame": "CY2012", "unit": "USD" }, { "start": "2011-01-02", "end": "2011-12-31", "val": -3153639, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD" }, { "start": "2010-01-03", "end": "2011-01-01", "val": -5032222, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "frame": "CY2010", "unit": "USD" }, { "start": "2009-01-04", "end": "2010-01-02", "val": 4867568, "accn": "0000095953-12-000007", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-14", "frame": "CY2009", "unit": "USD" } ] }, { "tag": "RetainedEarningsAccumulatedDeficit", "taxonomy": "us-gaap", "label": "Retained earnings or deficit", "kind": "instant", "unitKind": "money", "meaning": "Accumulated undistributed earnings or deficit at the reporting date. This balance is not cash available for distribution.", "observations": [ { "end": "2025-12-31", "val": 45786000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "unit": "USD" }, { "end": "2024-12-31", "val": 44919000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024Q4I", "unit": "USD" }, { "end": "2023-12-31", "val": 58517000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023Q4I", "unit": "USD" }, { "end": "2022-12-31", "val": 85146000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022Q4I", "unit": "USD" }, { "end": "2021-12-31", "val": 63080000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021Q4I", "unit": "USD" }, { "end": "2020-12-31", "val": 42835000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020Q4I", "unit": "USD" }, { "end": "2019-12-31", "val": 70552000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019Q4I", "unit": "USD" }, { "end": "2018-12-31", "val": 68965000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018Q4I", "unit": "USD" }, { "end": "2017-12-31", "val": 58129382, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2017Q4I", "unit": "USD" }, { "end": "2016-12-31", "val": 57936533, "accn": "0000095953-18-000031", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-13", "frame": "CY2016Q4I", "unit": "USD" }, { "end": "2015-12-31", "val": 65029474, "accn": "0000095953-17-000027", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-14", "frame": "CY2015Q4I", "unit": "USD" }, { "end": "2015-01-03", "val": 79167323, "accn": "0000095953-16-000165", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-30", "frame": "CY2014Q4I", "unit": "USD" }, { "end": "2013-12-28", "val": 76337597, "accn": "0000095953-15-000041", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-17", "frame": "CY2013Q4I", "unit": "USD" }, { "end": "2012-12-29", "val": 76836761, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2012Q4I", "unit": "USD" }, { "end": "2011-12-31", "val": 74198151, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "frame": "CY2011Q4I", "unit": "USD" }, { "end": "2011-01-01", "val": 69981395, "accn": "0000095953-12-000007", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-14", "frame": "CY2010Q4I", "unit": "USD" } ] }, { "tag": "WeightedAverageNumberOfSharesOutstandingBasic", "taxonomy": "us-gaap", "label": "Basic weighted-average shares", "kind": "duration", "unitKind": "shares", "meaning": "Time-weighted shares used for basic earnings per share. This denominator differs from shares outstanding at a single reporting date.", "observations": [ { "start": "2025-01-01", "end": "2025-12-31", "val": 9643000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2025", "unit": "shares" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 10106000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024", "unit": "shares" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 10140000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023", "unit": "shares" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 10230000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022", "unit": "shares" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 9340000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021", "unit": "shares" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 9140000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020", "unit": "shares" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 8983000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019", "unit": "shares" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 8806000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018", "unit": "shares" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 8705000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "shares" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 8649745, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2016", "unit": "shares" }, { "start": "2015-01-04", "end": "2015-12-31", "val": 8710361, "accn": "0000095953-18-000031", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-13", "frame": "CY2015", "unit": "shares" }, { "start": "2013-12-29", "end": "2015-01-03", "val": 8702094, "accn": "0000095953-17-000027", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-14", "frame": "CY2014", "unit": "shares" }, { "start": "2012-12-30", "end": "2013-12-28", "val": 6941794, "accn": "0000095953-16-000165", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-30", "frame": "CY2013", "unit": "shares" }, { "start": "2012-01-01", "end": "2012-12-29", "val": 6341856, "accn": "0000095953-15-000041", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-17", "frame": "CY2012", "unit": "shares" }, { "start": "2011-01-02", "end": "2011-12-31", "val": 6313418, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "shares" }, { "start": "2010-01-03", "end": "2011-01-01", "val": 6282497, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "frame": "CY2010", "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": 9643000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2025", "unit": "shares" }, { "start": "2024-01-01", "end": "2024-12-31", "val": 10106000, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024", "unit": "shares" }, { "start": "2023-01-01", "end": "2023-12-31", "val": 10140000, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023", "unit": "shares" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 10410000, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022", "unit": "shares" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 9456000, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021", "unit": "shares" }, { "start": "2020-01-01", "end": "2020-12-31", "val": 9140000, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020", "unit": "shares" }, { "start": "2019-01-01", "end": "2019-12-31", "val": 8983000, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019", "unit": "shares" }, { "start": "2018-01-01", "end": "2018-12-31", "val": 8878000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2018", "unit": "shares" }, { "start": "2017-01-01", "end": "2017-12-31", "val": 8728000, "accn": "0000095953-20-000021", "fy": 2019, "fp": "FY", "form": "10-K", "filed": "2020-03-06", "frame": "CY2017", "unit": "shares" }, { "start": "2016-01-01", "end": "2016-12-31", "val": 8649745, "accn": "0000095953-19-000043", "fy": 2018, "fp": "FY", "form": "10-K", "filed": "2019-03-18", "frame": "CY2016", "unit": "shares" }, { "start": "2015-01-04", "end": "2015-12-31", "val": 8710361, "accn": "0000095953-18-000031", "fy": 2017, "fp": "FY", "form": "10-K", "filed": "2018-03-13", "frame": "CY2015", "unit": "shares" }, { "start": "2013-12-29", "end": "2015-01-03", "val": 8715102, "accn": "0000095953-17-000027", "fy": 2016, "fp": "FY", "form": "10-K", "filed": "2017-03-14", "frame": "CY2014", "unit": "shares" }, { "start": "2012-12-30", "end": "2013-12-28", "val": 6947404, "accn": "0000095953-16-000165", "fy": 2015, "fp": "FY", "form": "10-K", "filed": "2016-03-30", "frame": "CY2013", "unit": "shares" }, { "start": "2012-01-01", "end": "2012-12-29", "val": 6394344, "accn": "0000095953-15-000041", "fy": 2014, "fp": "FY", "form": "10-K", "filed": "2015-03-17", "frame": "CY2012", "unit": "shares" }, { "start": "2011-01-02", "end": "2011-12-31", "val": 6362088, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "shares" }, { "start": "2010-01-03", "end": "2011-01-01", "val": 6309198, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "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": 0.09, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2025", "unit": "USD/shares" }, { "start": "2024-01-01", "end": "2024-12-31", "val": -1.35, "accn": "0000095953-26-000040", "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-03-03", "frame": "CY2024", "unit": "USD/shares" }, { "start": "2023-01-01", "end": "2023-12-31", "val": -2.63, "accn": "0000095953-25-000007", "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-03-04", "frame": "CY2023", "unit": "USD/shares" }, { "start": "2022-01-01", "end": "2022-12-31", "val": 2.16, "accn": "0000095953-24-000018", "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-04-01", "frame": "CY2022", "unit": "USD/shares" }, { "start": "2021-01-01", "end": "2021-12-31", "val": 2.17, "accn": "0000095953-23-000008", "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-03-31", "frame": "CY2021", "unit": "USD/shares" }, { "start": "2020-01-01", "end": "2020-12-31", "val": -2.98, "accn": "0000095953-22-000037", "fy": 2021, "fp": "FY", "form": "10-K", "filed": "2022-03-29", "frame": "CY2020", "unit": "USD/shares" }, { "start": "2019-01-01", "end": "2019-12-31", "val": -0.34, "accn": "0000095953-21-000032", "fy": 2020, "fp": "FY", "form": "10-K", "filed": "2021-03-09", "frame": "CY2019", "unit": "USD/shares" }, { "start": "2012-12-30", "end": "2013-12-28", "val": 0.25, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2013", "unit": "USD/shares" }, { "start": "2012-01-01", "end": "2012-12-29", "val": 0.67, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2012", "unit": "USD/shares" }, { "start": "2011-01-02", "end": "2011-12-31", "val": 0.92, "accn": "0000095953-14-000014", "fy": 2013, "fp": "FY", "form": "10-K", "filed": "2014-03-11", "frame": "CY2011", "unit": "USD/shares" }, { "start": "2010-01-03", "end": "2011-01-01", "val": 0.64, "accn": "0000095953-13-000008", "fy": 2012, "fp": "FY", "form": "10-K", "filed": "2013-03-12", "frame": "CY2010", "unit": "USD/shares" }, { "start": "2009-01-04", "end": "2010-01-02", "val": 0.03, "accn": "0000095953-12-000007", "fy": 2011, "fp": "FY", "form": "10-K", "filed": "2012-03-14", "frame": "CY2009", "unit": "USD/shares" } ] }, { "tag": "EarningsPerShareDiluted", "taxonomy": "us-gaap", "label": "Diluted earnings per share", "kind": "duration", "unitKind": "per-share", "meaning": "Reported earnings or loss per share under dilution rules. Antidilutive instruments may be excluded. 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