Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income	$ 80,535	$ 55,135	$ 134,451	$ 109,315
Other comprehensive income (loss):
Foreign currency translation adjustment	4,548	921	6,222	12,142
Change in net unrealized loss on derivatives	(3,456)	(1,144)	(4,258)	(14,279)
Comprehensive income	$ 81,627	$ 54,912	$ 136,415	$ 107,178