CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income	$ 236,288	$ 99,229	$ 154,115
Unrealized gain (loss) on defined benefit plan, net of tax	7,818	(3,723)	(4,142)
Unrealized gain (loss) on hedge instruments, net of tax	1,417	(3,183)	(3,652)
Unrealized foreign currency gain, net of tax	13,854	41,439	1,501
Comprehensive income	259,377	133,762	147,822
Less: Comprehensive income attributable to noncontrolling interest	(7,525)	(1,141)	(865)
Total comprehensive income attributable to common stockholders	$ 251,852	$ 132,621	$ 146,957