Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period	$ (427,889)	$ (75,487)	$ (368,576)	$ 60,653
Other comprehensive income (loss) before reclassifications			20,141	(12,617)
Reclassifications into earnings			10,234	10,110
Other comprehensive income (loss), net of tax	44,653	(30,078)	30,375	(2,507)
Balances, end of period	(518,879)	(125,109)	(518,879)	(125,109)
Cash flow hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			6,962	12,503
Other comprehensive income (loss) before reclassifications			822	(2,719)
Reclassifications into earnings			(5,875)	(284)
Other comprehensive income (loss), net of tax			(5,053)	(3,003)
Balances, end of period	1,909	9,500	1,909	9,500
Available for sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(33,463)	(39,440)
Other comprehensive income (loss) before reclassifications			4,998	(4,338)
Reclassifications into earnings			1,330	8
Other comprehensive income (loss), net of tax			6,328	(4,330)
Balances, end of period	(27,135)	(43,770)	(27,135)	(43,770)
Pension and postretirement benefit plans
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(757,452)	(716,056)
Other comprehensive income (loss) before reclassifications			0	0
Reclassifications into earnings			14,779	10,386
Other comprehensive income (loss), net of tax			14,779	10,386
Balances, end of period	(742,673)	(705,670)	(742,673)	(705,670)
Foreign currency adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(67,292)	(92,571)
Other comprehensive income (loss) before reclassifications			14,321	(5,560)
Reclassifications into earnings			0	0
Other comprehensive income (loss), net of tax			14,321	(5,560)
Balances, end of period	(52,971)	(98,131)	(52,971)	(98,131)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period	(865,523)	(807,993)	(851,245)	(835,564)
Other comprehensive income (loss), net of tax	44,653	(30,078)	30,375	(2,507)
Balances, end of period	$ (820,870)	$ (838,071)	$ (820,870)	$ (838,071)