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	$ 51,428	$ 51,223	$ 91,698	$ 91,876
Other comprehensive income, net of tax:
Gain on cash flow hedges, net of tax expense of $72, $94, $175 and $181, respectively	114	165	277	304
Comprehensive income	$ 51,542	$ 51,388	$ 91,975	$ 92,180