CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,954	$ 9,546	$ (28,324)	$ 124
Other comprehensive (loss) income:
Unrealized gain on hedging activity, net of tax of $158 and $989	558	0	3,509	0
Foreign currency translation adjustments	(11,088)	2,200	(24,123)	(8,085)
Comprehensive (loss) income	$ (7,576)	$ 11,746	$ (48,938)	$ (7,961)