Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 62,954	$ 57,526	$ 197,405	$ 166,841
Other comprehensive income (loss):
Foreign currency translation adjustment	7,317	(2,802)	13,539	9,340
Change in net unrealized (loss) gain on derivatives	(6,096)	4,015	(10,354)	(10,264)
Comprehensive income	$ 64,175	$ 58,739	$ 200,590	$ 165,917