Impairment and Store Dispositions, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 03, 2012	Jul. 29, 2011	Jul. 30, 2010
Schedule of Impaired Long-Lived Assets Held and Used, Held for Sale or Disposed [Line Items]
Impairment	$ 0	$ 3,219	$ 2,672
(Gains) on disposition of stores	0	(4,109)	0
Store closing costs	0	265	128
Total	0	(625)	2,800
Number of stores determined to be impaired		1	1
Number of stores closed during the period			1
Number of previously closed stores sold during the period		2
Net proceeds from store closing		1,054
Net proceeds from condemnation award		6,576
Condemnation gain		3,624
Owned Store [Member]
Schedule of Impaired Long-Lived Assets Held and Used, Held for Sale or Disposed [Line Items]
(Gains) on disposition of stores		(485)
Impairment charges incurred during the period			409
Leased Store [Member]
Schedule of Impaired Long-Lived Assets Held and Used, Held for Sale or Disposed [Line Items]
Impairment charges incurred during the period		2,175	2,263
Office Space [Member]
Schedule of Impaired Long-Lived Assets Held and Used, Held for Sale or Disposed [Line Items]
Impairment charges incurred during the period		$ 1,044