v3.26.1
Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances, beginning of period $ (802,360) $ (578,433)
Other comprehensive income (loss) before reclassifications (9,702) 22,165
Reclassifications into earnings 6,535 5,431
Other comprehensive (loss) income, net of tax (3,167) 27,596
Balances, end of period (893,572) (535,884)
Total    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances, beginning of period (789,132) (839,171)
Other comprehensive (loss) income, net of tax (3,167) 27,596
Balances, end of period (792,299) (811,575)
Available for sale securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances, beginning of period (22,569) (29,597)
Other comprehensive income (loss) before reclassifications (476) 2,616
Reclassifications into earnings 0 379
Other comprehensive (loss) income, net of tax (476) 2,995
Balances, end of period (23,045) (26,602)
Pension and postretirement benefit plans    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances, beginning of period (713,098) (704,818)
Other comprehensive income (loss) before reclassifications 0 0
Reclassifications into earnings 6,535 5,052
Other comprehensive (loss) income, net of tax 6,535 5,052
Balances, end of period (706,563) (699,766)
Foreign currency adjustments    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances, beginning of period (53,465) (104,756)
Other comprehensive income (loss) before reclassifications (9,226) 19,549
Reclassifications into earnings 0 0
Other comprehensive (loss) income, net of tax (9,226) 19,549
Balances, end of period $ (62,691) $ (85,207)