CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME Statement - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net (loss) income	$ (13,555)	$ 48,219	$ 2,480
Other comprehensive income (loss):
Foreign currency translation adjustments	7,470	(1,717)	(6,566)
Comprehensive (loss) income	$ (6,085)	$ 46,502	$ (4,086)