CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 11,107	$ 12,813	$ 33,649
Currency translation adjustments, net of tax	(4,700)	(13,166)	(13,961)
Comprehensive income (loss)	$ 6,407	$ (353)	$ 19,688