Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 130,241	$ 89,388	$ 101,931
Foreign currency translation adjustment	292	(31)	0
Other comprehensive income (loss), before tax	292	(31)	0
Income tax expense on other comprehensive income (loss)	0	0	0
Other comprehensive income (loss), net of tax	292	(31)	0
Comprehensive income	$ 130,533	$ 89,357	$ 101,931