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Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Other Comprehensive Income (Loss), before tax |  | $ 31,664 |  | $ (8,352) |  | $ 44,354 | $ (34,006)
Other Comprehensive Income (Loss), income tax |  | 326 |  | 3,037 |  | 732 | 6,199
Other Comprehensive Income (Loss), Net of Tax |  | 31,990 | $ 13,096 | (5,315) | $ (22,492) | 45,086 | (27,807)
Foreign Currency Translation Adjustment [Member] |  |  |  |  |  |  |
Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, before Tax |  | 32,283 |  | 3,517 |  | 46,550 | (9,767)
Other Comprehensive Income (Loss) before Reclassifications, Tax |  | 0 |  | 0 |  | 0 | 0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  | 32,283 |  | 3,517 |  | 46,550 | (9,767)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  | 646 |  | 0 |  | 646 | 0
Reclassification from AOCI, Current Period, Tax |  | 0 |  | 0 |  | 0 | 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 646 |  | 0 |  | 646 | 0
Other Comprehensive Income (Loss), before tax |  | 32,929 |  | 3,517 |  | 47,196 | (9,767)
Other Comprehensive Income (Loss), income tax |  | 0 |  | 0 |  | 0 | 0
Other Comprehensive Income (Loss), Net of Tax |  | 32,929 |  | 3,517 |  | 47,196 | (9,767)
Pension and Other Postretirement Plans [Member] |  |  |  |  |  |  |
Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  |  |  |  | 0 |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  | (901) |  | (12,215) |  | (1,799) | (25,696)
Reclassification from AOCI, Current Period, Tax |  | 231 |  | 3,128 |  | 461 | 6,579
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | (670) |  | (9,087) |  | (1,338) | (19,117)
Other Comprehensive Income (Loss), before tax |  | (901) |  | (12,215) |  | (1,799) | (25,696)
Other Comprehensive Income (Loss), income tax |  | 231 |  | 3,128 |  | 461 | 6,579
Other Comprehensive Income (Loss), Net of Tax |  | (670) |  | (9,087) |  | (1,338) | (19,117)
Net Prior Service Credit [Member] |  |  |  |  |  |  |
Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [1] | (521) |  | (482) |  | (1,040) | (976)
Reclassification from AOCI, Current Period, Tax |  | 133 |  | 124 |  | 266 | 250
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | (388) |  | (358) |  | (774) | (726)
Net Actuarial Gain [Member] |  |  |  |  |  |  |
Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [1] | (380) |  | (11,733) |  | (759) | (24,720)
Reclassification from AOCI, Current Period, Tax |  | 98 |  | 3,004 |  | 195 | 6,329
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | (282) |  | (8,729) |  | (564) | (18,391)
Cash Flow Hedges [Member] |  |  |  |  |  |  |
Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |  |  |  |  |  | (893) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  |  |  |  |  | 121 |
Other Comprehensive Income (Loss), before tax |  | (364) |  | 346 |  | (1,043) | 1,457
Other Comprehensive Income (Loss), income tax |  | 95 |  | (91) |  | 271 | (380)
Other Comprehensive Income (Loss), Net of Tax |  | $ (269) |  | $ 255 |  | $ (772) | $ 1,077
[1] | These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension and postretirement plan cost (see Note 11) and are included in non-operating pension and postretirement benefit income in the Company’s Condensed Consolidated Statements of Operations.

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