CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2014	Feb. 01, 2013	Jan. 31, 2014	Feb. 01, 2013
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net income	$ 37,055	$ 35,168	$ 64,215	$ 58,360
Other comprehensive income before income tax expense:
Change in fair value of interest rate swaps	1,505	7,010	1,377	12,511
Income tax expense	580	2,703	530	4,790
Other comprehensive income, net of tax	925	4,307	847	7,721
Comprehensive income	$ 37,980	$ 39,475	$ 65,062	$ 66,081