Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	$ 1,118,895
Other comprehensive income (loss) before reclassifications	(11,757)	$ (13,259)
Amounts reclassified from accumulated other comprehensive loss	86	63
Other comprehensive income (loss)	(11,671)	(13,196)
Balance, end of period	1,117,478	1,040,855
AOCI, Pension and other postretirement benefit plans, tax	2,100	1,940	$ 2,125	$ 1,951
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(45,243)	(19,575)
Other comprehensive income (loss)	(11,671)	(13,196)
Balance, end of period	(56,914)	(32,771)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(35,641)	(10,571)
Other comprehensive income (loss) before reclassifications	(11,757)	(13,259)
Amounts reclassified from accumulated other comprehensive loss	0	0
Other comprehensive income (loss)	(11,757)	(13,259)
Balance, end of period	(47,398)	(23,830)
Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(9,602)	(9,004)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	86	63
Other comprehensive income (loss)	86	63
Balance, end of period	$ (9,516)	$ (8,941)