CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,607	$ (25,164)	$ (9,422)	$ (50,301)
Other comprehensive loss:
Foreign currency translation adjustments	(8,415)	5,277	(10,285)	4,733
Comprehensive loss	$ (5,808)	$ (19,887)	$ (19,707)	$ (45,568)