Shareholders' Equity, Reclassification Out of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	May 02, 2014	May 03, 2013	May 02, 2014	May 03, 2013
Amounts reclassified out of AOCL related to interest expense and provision for income taxes [Abstract]
Interest expense	$ 4,327	$ 10,194	$ 13,205	$ 31,199
Provision for income taxes	12,158	9,376	42,008	32,516
Interest Rate Swaps [Member]
Amounts reclassified out of AOCL related to interest expense and provision for income taxes [Abstract]
Net of tax			(3,707)
Interest Rate Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Amounts reclassified out of AOCL related to interest expense and provision for income taxes [Abstract]
Interest expense	(2,007)		(6,033)
Provision for income taxes	774		2,326
Net of tax	$ (1,233)		$ (3,707)