Other Accrued Liabilities (Details) (USD $)	Jul. 27, 2013	Jul. 28, 2012
Other Accrued Liabilities [Line Items]
Accrued payroll and related taxes	$ 19,940,000	$ 19,248,000
Accrued employee benefit and incentive plan costs	15,325,000	12,488,000
Accrued construction costs	20,883,000	11,515,000
Other current liabilities	15,043,000	7,675,000
Total other accrued liabilities	71,191,000	50,926,000
Other Accrued Liabilities
Other Accrued Liabilities [Line Items]
Accrued income taxes for other current liabilities	$ 2,300,000