Other Income, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 27, 2013	Apr. 28, 2012	Apr. 27, 2013	Apr. 28, 2012
Component of Other Income, Nonoperating [Line Items]
Gain on sale of fixed assets	$ 1,459	$ 7,439	$ 3,867	$ 12,578
Miscellaneous income, net	18	188	(27)	365
Write-off of deferred financing costs	0	0	(321)	0
Total other income, net	1,477	7,627	3,519	12,943
Prior Credit Agreement Which Has Been Terminated or Replaced | Revolving Credit Facility
Component of Other Income, Nonoperating [Line Items]
Write-off of deferred financing costs			$ (321)