CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
NET INCOME	$ 70,726	$ 72,336	$ 134,963	$ 139,468
OTHER COMPREHENSIVE (LOSS) INCOME
Derivative instruments, net of tax (Note 6)	(5,348)	1,986	(7,771)	1,259
Available-for-sale securities, net of tax (Note 6)	169	(103)	430	3
TOTAL OTHER COMPREHENSIVE (LOSS) INCOME, NET OF TAX	(5,179)	1,883	(7,341)	1,262
TOTAL COMPREHENSIVE INCOME	$ 65,547	$ 74,219	$ 127,622	$ 140,730