Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 13,918	$ 11,687
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustments, net of taxes	(21,350)	1,362
Unrealized gain (loss) on cash flow hedging instruments, net of taxes	(1,342)	1,672
Unrealized actuarial gain (loss) related to pension liability, net of taxes	(17)	(15)
Unrealized gain (loss) on postretirement obligation, net of taxes	(22)	(5)
Other comprehensive income (loss), net of taxes	(22,731)	3,014
Comprehensive income (loss)	$ (8,813)	$ 14,701