Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 6,102	$ (31,341)	$ (18,126)	$ (43,605)
Foreign currency translation adjustment	672	(4,809)	2,481	(4,935)
Foreign currency hedge	(184)	788	95	367
Other comprehensive income (loss), before tax	488	(4,021)	2,576	(4,568)
Tax (provision) benefit attributable to other comprehensive income (loss)	329	560	260	790
Other comprehensive income (loss), net of tax	817	(3,461)	2,836	(3,778)
Total comprehensive income (loss)	$ 6,919	$ (34,802)	$ (15,290)	$ (47,383)