Other Income, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 25, 2014	Jan. 26, 2013	Jan. 25, 2014	Jan. 26, 2013
Other Income, Net [Line Items]
Gain on sale of fixed assets	$ 570	$ 826	$ 2,435	$ 2,407
Miscellaneous income (expense), net	25	(77)	172	(44)
Write off of Deferred Debt Issuance Cost			0	(321)
Total other income, net	595	428	2,607	2,042
Revolving Credit Facility | Prior Credit Agreement Which Has Been Terminated or Replaced
Other Income, Net [Line Items]
Write off of Deferred Debt Issuance Cost	$ 0	$ (321)	$ 0	$ (321)