Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 118,768	$ 97,243	$ 133,383
Other comprehensive income/(loss), before tax:
Foreign currency translation and other adjustments	(20,808)	38,927	(8,747)
Pension settlements and curtailments	0	411	450
Pension/postretirement plan remeasurement	(2,259)	13,407	(1,796)
Amortization of pension and postretirement liability adjustments:
Prior service credit	(4,475)	(4,474)	(4,420)
Net actuarial loss	4,625	5,004	4,480
Payments and amortization related to interest rate swaps included in earnings	6,852	3,982	(1,011)
Derivative valuation adjustment	3,764	(12,622)	(9,512)
Income taxes related to items of other comprehensive income/(loss):
Pension settlements and curtailments	0	(128)	(74)
Pension/postretirement plan remeasurement	1,463	(3,017)	359
Amortization of pension and postretirement liability adjustments	(52)	(148)	(13)
Payments and amortization related to interest rate swaps included in earnings	(1,734)	(1,028)	259
Derivative valuation adjustment	(952)	3,259	2,432
Comprehensive income	105,192	140,816	115,790
Comprehensive income/(loss) attributable to the noncontrolling interest	(161)	(207)	975
Comprehensive income attributable to the Company	$ 105,353	$ 141,023	$ 114,815