Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Comprehensive income
Net income	$ 7,955	$ 23,288	$ 23,678	$ 59,522
Other comprehensive income
Foreign currency translation adjustment	106	168	1,026	46
Comprehensive income	$ 8,061	$ 23,456	$ 24,704	$ 59,568