Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period	$ 59,964	$ 92,882	$ 60,653	$ 112,632
Other comprehensive (loss) income before reclassifications			20,531	(85,440)
Reclassifications into earnings			7,040	15,699
Other comprehensive income (loss), net of tax	11,985	(49,723)	27,571	(69,741)
Balances, end of period	(75,487)	44,154	(75,487)	44,154
Cash flow hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			12,503	3,803
Other comprehensive (loss) income before reclassifications			(1,506)	6,817
Reclassifications into earnings			(181)	(255)
Other comprehensive income (loss), net of tax			(1,687)	6,562
Balances, end of period	10,816	10,365	10,816	10,365
Available for sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(39,440)	(6,249)
Other comprehensive (loss) income before reclassifications			1,957	(26,554)
Reclassifications into earnings			(7)	(11)
Other comprehensive income (loss), net of tax			1,950	(26,565)
Balances, end of period	(37,490)	(32,814)	(37,490)	(32,814)
Pension and postretirement benefit plans
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(716,056)	(756,639)
Other comprehensive (loss) income before reclassifications			0	0
Reclassifications into earnings			7,228	15,965
Other comprehensive income (loss), net of tax			7,228	15,965
Balances, end of period	(708,828)	(740,674)	(708,828)	(740,674)
Foreign currency adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(92,571)	(21,227)
Other comprehensive (loss) income before reclassifications			20,080	(65,703)
Reclassifications into earnings			0	0
Other comprehensive income (loss), net of tax			20,080	(65,703)
Balances, end of period	(72,491)	(86,930)	(72,491)	(86,930)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period	(819,978)	(800,330)	(835,564)	(780,312)
Other comprehensive income (loss), net of tax	11,985	(49,723)	27,571	(69,741)
Balances, end of period	$ (807,993)	$ (850,053)	$ (807,993)	$ (850,053)