v3.26.1
Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balances, beginning of period $ (893,572) $ (535,884) $ (802,360) $ (578,433)
Other comprehensive income (loss) before reclassifications     (15,625) 64,327
Reclassifications into earnings     14,331 10,568
Other comprehensive income (loss), net of tax 1,873 47,299 (1,294) 74,895
Balances, end of period (863,279) (536,809) (863,279) (536,809)
Total        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balances, beginning of period (792,299) (811,575) (789,132) (839,171)
Other comprehensive income (loss), net of tax 1,873 47,299 (1,294) 74,895
Balances, end of period (790,426) (764,276) (790,426) (764,276)
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     (239) 3,319
Reclassifications into earnings     0 379
Other comprehensive income (loss), net of tax     (239) 3,698
Balances, end of period (22,808) (25,899) (22,808) (25,899)
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     14,331 10,189
Other comprehensive income (loss), net of tax     14,331 10,189
Balances, end of period (698,767) (694,629) (698,767) (694,629)
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     (15,386) 61,008
Reclassifications into earnings     0 0
Other comprehensive income (loss), net of tax     (15,386) 61,008
Balances, end of period $ (68,851) $ (43,748) $ (68,851) $ (43,748)