Other Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Apr. 27, 2013	Jul. 28, 2012
Payables and Accruals [Abstract]
Accrued payroll and related taxes	$ 19,743	$ 19,248
Accrued employee benefit and incentive plan costs	10,980	12,488
Accrued construction costs	17,717	11,515
Accrued interest and related bank fees	5,916	0
Other current liabilities	10,552	7,675
Total other accrued liabilities	$ 64,908	$ 50,926