Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (7,057)	$ (23,526)	$ (25,183)	$ (67,131)
Other comprehensive income (loss) before tax:
Foreign currency translation adjustment	(2,954)	516	(473)	(4,419)
Foreign currency hedge	556	97	651	464
Other comprehensive income (loss), before tax	(2,398)	613	178	(3,955)
Tax (provision) benefit attributable to other comprehensive income (loss)	(148)	202	112	992
Other comprehensive income (loss), net of tax	(2,546)	815	290	(2,963)
Total comprehensive income (loss)	$ (9,603)	$ (22,711)	$ (24,893)	$ (70,094)