CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 5,780	$ (5,857)	$ 10,874	$ (62,278)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	3,060	5,146	46	(4,811)
Pension liability adjustment, net of taxes of less than $0.1 million, $0.0 million, $0.1 million and $0.1 million, respectively	22	0	387	331
Unrealized gain (loss) on hedging activities, net of taxes of $0.4 million, $0.2 million, $0.9 million, and $0.1 million, respectively	(125)	(685)	2,893	(239)
Other comprehensive income (loss)	2,957	4,461	3,326	(4,719)
Total comprehensive income (loss)	$ 8,737	$ (1,396)	$ 14,200	$ (66,997)