Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,653	$ (13,451)	$ 3,302	$ (40,655)
Foreign currency translation adjustments	1,657	1,625	9,481	2,494
Comprehensive income (loss)	$ 4,310	$ (11,826)	$ 12,783	$ (38,161)