CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - 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)	$ 1,628	$ 1,090	$ (3,458)	$ 7,562
Currency translation adjustments, net of income tax	3,875	1,339	15,174	6,165
Comprehensive income	$ 5,503	$ 2,429	$ 11,716	$ 13,727