v3.26.3
Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Other Comprehensive Income (Loss) [Line Items]                
Other Comprehensive Income (Loss), before tax $ 33,690     $ (9,061)     $ (193,384) $ 35,293
Other Comprehensive Income (Loss), income tax (7,902)     212     51,181 944
Other Comprehensive Income (Loss), Net of Tax 25,788 $ (161,649) $ (6,342) (8,849) $ 31,990 $ 13,096 (142,203) 36,237
Foreign Currency Translation Adjustment [Member]                
Other Comprehensive Income (Loss) [Line Items]                
Other Comprehensive Income (Loss), before Reclassifications, before Tax 3,309     (8,227)     (2,814) 38,323
Other Comprehensive Income (Loss) before Reclassifications, Tax 0     0     0 0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 3,309     (8,227)     (2,814) 38,323
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax             6,175 646
Reclassification from AOCI, Current Period, Tax             0 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax             6,175 646
Other Comprehensive Income (Loss), before tax             3,361 38,969
Other Comprehensive Income (Loss), income tax             0 0
Other Comprehensive Income (Loss), Net of Tax             3,361 38,969
Pension and Other Postretirement Plans [Member]                
Other Comprehensive Income (Loss) [Line Items]                
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax             (33,156)  
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax (15,704)     (898)     (154,168) (2,697)
Reclassification from AOCI, Current Period, Tax 4,085     229     40,103 690
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (11,619)     (669)     (114,065) (2,007)
Other Comprehensive Income (Loss), before tax 29,411     (898)     (198,981) (2,697)
Other Comprehensive Income (Loss), income tax (7,651)     229     51,760 690
Other Comprehensive Income (Loss), Net of Tax 21,760     (669)     (147,221) (2,007)
Net Prior Service Credit [Member]                
Other Comprehensive Income (Loss) [Line Items]                
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax [1] (496)     (520)     (1,489) (1,560)
Reclassification from AOCI, Current Period, Tax 129     133     388 399
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (367)     (387)     (1,101) (1,161)
Net Actuarial Gain (Loss) [Member]                
Other Comprehensive Income (Loss) [Line Items]                
Other Comprehensive Income (Loss), before Reclassifications, before Tax 45,115     0     (44,813) 0
Other Comprehensive Income (Loss) before Reclassifications, Tax (11,736)     0     11,657 0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 33,379     0     (33,156) 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax [1] (258)     (378)     (774) (1,137)
Reclassification from AOCI, Current Period, Tax 67     96     201 291
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (191)     (282)     (573) (846)
Settlement Gains Included In Net Income [Member]                
Other Comprehensive Income (Loss) [Line Items]                
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax (14,950)     0     (151,905) 0
Reclassification from AOCI, Current Period, Tax 3,889     0     39,514 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (11,061)     0     (112,391) 0
Cash Flow Hedges [Member]                
Other Comprehensive Income (Loss) [Line Items]                
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax             1,159  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax             498  
Other Comprehensive Income (Loss), before tax 970     64     2,236 (979)
Other Comprehensive Income (Loss), income tax (251)     (17)     (579) 254
Other Comprehensive Income (Loss), Net of Tax $ 719     $ 47     $ 1,657 $ (725)
[1] These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension and postretirement plan cost (see Note 12) and are included in non-operating pension and postretirement benefit income in the Company’s Condensed Consolidated Statements of Operations.