CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (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)	$ 5,725	$ (14,574)	$ (20,238)	$ (34,002)
Other comprehensive loss:
Foreign currency translation adjustments	(1,730)	(12,907)	(409)	(7,248)
Total other comprehensive loss	(1,730)	(12,907)	(409)	(7,248)
Comprehensive income (loss)	$ 3,995	$ (27,481)	$ (20,647)	$ (41,250)