Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 21,595	$ 20,614	$ 53,156	$ 53,151
Other comprehensive loss:
Translation adjustment, net of tax expense of ($36) and ($63), and ($33) and ($19), respectively	(6,162)	(15,897)	(14,864)	(17,091)
Comprehensive income	$ 15,433	$ 4,717	$ 38,292	$ 36,060