CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,205	$ (3,625)	$ 1,660	$ (5,086)
Currency translation adjustments, net of income tax	(9,377)	7,140	(4,163)	11,299
Comprehensive (loss) income	$ (8,172)	$ 3,515	$ (2,503)	$ 6,213