Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 9,933	$ 10,570
OTHER COMPREHENSIVE LOSS
Foreign currency translation adjustments	(222)	(293)
COMPREHENSIVE INCOME	$ 9,711	$ 10,277