Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period	$ (536,809)	$ (427,889)	$ (578,433)	$ (368,576)
Other comprehensive income before reclassifications			58,166	20,141
Reclassifications into earnings			15,651	10,234
Other comprehensive (loss) income, net of tax	(1,078)	44,653	73,817	30,375
Balances, end of period	(661,538)	(518,879)	(661,538)	(518,879)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period	(764,276)	(865,523)	(839,171)	(851,245)
Other comprehensive (loss) income, net of tax	(1,078)	44,653	73,817	30,375
Balances, end of period	(765,354)	(820,870)	(765,354)	(820,870)
Cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period				6,962
Other comprehensive income before reclassifications				822
Reclassifications into earnings				(5,875)
Other comprehensive (loss) income, net of tax				(5,053)
Balances, end of period		1,909		1,909
Available for sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period			(29,597)	(33,463)
Other comprehensive income before reclassifications			5,680	4,998
Reclassifications into earnings			379	1,330
Other comprehensive (loss) income, net of tax			6,059	6,328
Balances, end of period	(23,538)	(27,135)	(23,538)	(27,135)
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 before reclassifications			0	0
Reclassifications into earnings			15,272	14,779
Other comprehensive (loss) income, net of tax			15,272	14,779
Balances, end of period	(689,546)	(742,673)	(689,546)	(742,673)
Foreign currency adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, beginning of period			(104,756)	(67,292)
Other comprehensive income before reclassifications			52,486	14,321
Reclassifications into earnings			0	0
Other comprehensive (loss) income, net of tax			52,486	14,321
Balances, end of period	$ (52,270)	$ (52,971)	$ (52,270)	$ (52,971)