Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 123,714	$ 98,650	$ 86,785
Other comprehensive income (loss):
Foreign currency translation adjustments	(3,930)	(3,564)	(475)
Change in fair value of interest rate swap	242	(1,180)	0
Other comprehensive income (loss)	(3,688)	(4,744)	(475)
Comprehensive income	$ 120,026	$ 93,906	$ 86,310