Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period	$ (535,884)	$ (392,355)	$ (578,433)	$ (368,576)
Other comprehensive income (loss) before reclassifications			64,327	(21,296)
Reclassifications into earnings			10,568	7,018
Other comprehensive income (loss), net of tax	47,299	(1,712)	74,895	(14,278)
Balances, end of period	(536,809)	(427,889)	(536,809)	(427,889)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period	(811,575)	(863,811)	(839,171)	(851,245)
Other comprehensive income (loss), net of tax	47,299	(1,712)	74,895	(14,278)
Balances, end of period	(764,276)	(865,523)	(764,276)	(865,523)
Cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period				6,962
Other comprehensive income (loss) before reclassifications				964
Reclassifications into earnings				(3,881)
Other comprehensive income (loss), net of tax				(2,917)
Balances, end of period		4,045		4,045
Available for sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period			(29,597)	(33,463)
Other comprehensive income (loss) before reclassifications			3,319	(1,843)
Reclassifications into earnings			379	851
Other comprehensive income (loss), net of tax			3,698	(992)
Balances, end of period	(25,899)	(34,455)	(25,899)	(34,455)
Pension and postretirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period			(704,818)	(757,452)
Other comprehensive income (loss) before reclassifications			0	0
Reclassifications into earnings			10,189	10,048
Other comprehensive income (loss), net of tax			10,189	10,048
Balances, end of period	(694,629)	(747,404)	(694,629)	(747,404)
Foreign currency adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period			(104,756)	(67,292)
Other comprehensive income (loss) before reclassifications			61,008	(20,417)
Reclassifications into earnings			0	0
Other comprehensive income (loss), net of tax			61,008	(20,417)
Balances, end of period	$ (43,748)	$ (87,709)	$ (43,748)	$ (87,709)