CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 4,930	$ (14,516)	$ 11,107
Currency translation adjustments	(10,661)	16,739	(4,700)
Comprehensive (loss) income	$ (5,731)	$ 2,223	$ 6,407