CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 29, 2016	Jan. 30, 2015	Jan. 29, 2016	Jan. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net income	$ 48,242	$ 47,163	$ 89,107	$ 81,187
Other comprehensive loss before income tax benefit:
Change in fair value of interest rate swaps	(5,048)	(6,112)	(9,930)	(6,887)
Income tax benefit	(1,931)	(2,357)	(3,780)	(2,656)
Other comprehensive loss, net of tax	(3,117)	(3,755)	(6,150)	(4,231)
Comprehensive income	$ 45,125	$ 43,408	$ 82,957	$ 76,956