Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 19,036	$ 13,579	$ 37,372	$ 28,996
Other comprehensive income (loss):
Foreign currency translation adjustments	1,366	1,471	(4,034)	2,599
Total other comprehensive income (loss)	1,366	1,471	(4,034)	2,599
Comprehensive income	$ 20,402	$ 15,050	$ 33,338	$ 31,595