Impairment and Store Dispositions, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 02, 2013	Aug. 03, 2012	Jul. 29, 2011 Store
Schedule of Impaired Long Lived Assets Held and Used, Held for Sale or Disposed [Line Items]
Impairment	$ 0	$ 0	$ 3,219
(Gains) on disposition of stores	0	0	(4,109)
Store closing costs	0	0	265
Total	0	0	(625)
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)
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
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