Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (2,010)	$ 7,760	$ 21,512	$ (2,200)	$ (618)	$ (3,385)	$ 27,262	$ (6,203)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	300			(18)			1,845	309
(Loss) gain on long-term intra-entity foreign currency transactions	154			(509)			(4,725)	(373)
Cash flow hedging activity	120			(127)			(162)	(1,426)
Reclassification of hedging activities into earnings	(432)			122			(457)	268
Reclassification of pension adjustments into earnings	114			127			406	313
Total other comprehensive income (loss), net of tax	256			(405)			(3,093)	(909)
Comprehensive income (loss)	$ (1,754)			$ (2,605)			$ 24,169	$ (7,112)