Commitments and Contingencies (Details) (USD $) In Thousands	12 Months Ended
	Jul. 29, 2011	Jul. 30, 2010	Jul. 31, 2009
Guarantor Obligations [Line Items]
Annual lease payments under operating lease agreement	$ 39,391	$ 39,793	$ 33,929
Total guarantee of lease agreement	1,021
Potential tax indemnifications		20
Financial Standby Letter of Credit [Member]
Guarantor Obligations [Line Items]
Standby letters of credit	29,981
Third party lease guarantees [Member]
Guarantor Obligations [Line Items]
Annual lease payments under operating lease agreement	361
Remaining life of lease with guaranteed payments (in years)		2.2Y
Total guarantee of lease agreement	781
Indemnification Agreement Logan's #1 [Member]
Guarantor Obligations [Line Items]
Annual lease payments under operating lease agreement	94
Remaining life of lease with guaranteed payments (in years)		0.4Y
Indemnification agreement Logan's #2 [Member]
Guarantor Obligations [Line Items]
Annual lease payments under operating lease agreement	$ 108
Remaining life of lease with guaranteed payments (in years)		8.7Y