Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 79,129	$ 123,714	$ 98,650
Other comprehensive income (loss):
Foreign currency translation adjustments	(4,191)	(3,930)	(3,564)
Change in fair value of interest rate swap	337	242	(1,180)
Other comprehensive income (loss)	(3,854)	(3,688)	(4,744)
Comprehensive income	$ 75,275	$ 120,026	$ 93,906