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	$ (3,569)	$ 973	$ 20,717	$ 12,615
Other comprehensive income (loss):
Cash flow hedges	(144)	(103)	166	(984)
Less income tax benefit (expense)	56	40	(64)	383
Foreign currency translation adjustment	721	454	2,925	1,259
Less income tax benefit (expense)	0	0	(252)	(210)
Total other comprehensive income	633	391	2,775	448
Total comprehensive income (loss)	$ (2,936)	$ 1,364	$ 23,492	$ 13,063