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	$ 108,133	$ 49,990	$ 47,319
Foreign currency translation adjustment	(25,070)	24,907	(4,990)
Pension and other postretirement benefits:
Pension settlement (benefits) charges, net of tax	0	(48)	43,934
Actuarial net gain (loss) incurred, net of tax	(823)	1,255	(6,079)
Amortization of loss, net of tax	225	244	390
Derivative instrument designated as cash flow hedge:
Change in unrealized loss before reclassifications, net of tax	0	(1,504)	(1,171)
Unrealized loss (gain) reclassified into earnings, net of tax	0	2,476	(155)
Other comprehensive income (loss)	(25,668)	27,330	31,929
Comprehensive income	$ 82,465	$ 77,320	$ 79,248