Condensed 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
Statement of Comprehensive Income [Abstract]
Net income	$ 29,797	$ 21,595	$ 72,341	$ 53,156
Other comprehensive income (loss):
Translation adjustment, net of tax (expense) of ($37), ($36), ($166) and ($33), respectively, for each period on the right	232	(6,162)	5,244	(14,864)
Comprehensive income	$ 30,029	$ 15,433	$ 77,585	$ 38,292