CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 42,017	$ 27,523	$ 20,121
Other comprehensive income (loss):
Cash flow hedges	64
Cash flow hedges		901	4,784
Less income tax (expense)	(16)
Less income tax (expense)		(350)	(1,861)
Foreign currency translation adjustment	(3,606)	3,117	878
Less income tax (expense)	(9)	(252)	(196)
Total other comprehensive income (loss)	(3,567)	3,416	3,605
Total comprehensive income	$ 38,450	$ 30,939	$ 23,726