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
Condensed Consolidated Statements of Comprehensive Income
Net income	$ 17,079	$ 34,035	$ 22,183	$ 57,743
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment during the period	1,217	(40)	1,654	1,272
Other comprehensive income (loss)	1,217	(40)	1,654	1,272
Comprehensive income	$ 18,296	$ 33,995	$ 23,837	$ 59,015