Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period	$ (368,576)	$ 60,653
Other comprehensive income (loss) before reclassifications	(16,150)	12,209
Reclassifications into earnings	3,584	3,377
Other comprehensive (loss) income, net of tax	(12,566)	15,586
Balances, end of period	(392,355)	59,964
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	702	(1,958)
Reclassifications into earnings	(1,943)	(104)
Other comprehensive (loss) income, net of tax	(1,241)	(2,062)
Balances, end of period	5,721	10,441
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	(1,453)	3,280
Reclassifications into earnings	486	(8)
Other comprehensive (loss) income, net of tax	(967)	3,272
Balances, end of period	(34,430)	(36,168)
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	5,041	3,489
Other comprehensive (loss) income, net of tax	5,041	3,489
Balances, end of period	(752,411)	(712,567)
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	(15,399)	10,887
Reclassifications into earnings	0	0
Other comprehensive (loss) income, net of tax	(15,399)	10,887
Balances, end of period	(82,691)	(81,684)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period	(851,245)	(835,564)
Other comprehensive (loss) income, net of tax	(12,566)	15,586
Balances, end of period	$ (863,811)	$ (819,978)