CONSOLIDATED COMPREHENSIVE INCOME STATEMENTS - 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	$ 8,375	$ 8,488	$ 13,564	$ 12,761
Other comprehensive income (loss):
Change in foreign currency translation adjustment	1,098	267	(3,160)	(1,844)
Comprehensive income (loss)	$ 9,473	$ 8,755	$ 10,404	$ 10,917