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Accumulated Other Comprehensive Income (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Unrecognized pension income, net of tax of $6,261 and $6,282, respectively | $ (90,874) | $ (150,273) | $ (83,462) | $ (156,317) | $ (48,829) | $ (46,206)
Accumulated Other Comprehensive Income | 2,836 | 721 |  |  |  |
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Unrecognized pension income, net of tax of $6,261 and $6,282, respectively | 2,193 | 2,117 |  |  |  |
Unrealized gain (loss) on foreign currency derivatives, net of tax of $528 and $0, respectively | 552 | (1,396) |  |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Unrealized gain on commodity swap derivatives, net of tax of $25 and $0, respectively | $ 91 | $ 0 |  |  |  |

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- Definition Unrealized gain (loss) on foreign currency derivatives. + References No definition available. + Details
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