CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Comprehensive Income (Loss)
Net Income	$ 38,054	$ 51,425
Other comprehensive (loss) income, net of tax:
Foreign currency translation	(118)	268
Cash flow hedges:
Reclassification of net losses (gains) on derivative instruments	37	(89)
Other comprehensive (loss) income	(81)	179
Comprehensive Income	$ 37,973	$ 51,604