Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 13,595	$ 7,350	$ 17,733	$ 17,673
Other comprehensive income (loss):
Foreign currency translation	(20)	(84)	(24)	256
Total other comprehensive income (loss)	(20)	(84)	(24)	256
Total comprehensive income	$ 13,575	$ 7,266	$ 17,709	$ 17,929