Unaudited Condensed Consolidated Statements of Comprehensive Income - 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	$ 6,305	$ 7,027	$ 17,083	$ 12,146
Other comprehensive (loss) income:
Foreign currency translation adjustment	(363)	137	(1,015)	720
Comprehensive income	$ 5,942	$ 7,164	$ 16,068	$ 12,866