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Basis of Presentation and Accounting Policies (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 29, 2016 USD ($) segment | Oct. 24, 2015 | Jul. 30, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |
Number of reportable segments | segment | 1 |  |
Prepaid Expense and Other Assets | $ 18,000 |  | $ 17,700
Debt Issuance Costs, Net | 5,900 |  | 6,400
Insurance recoveries/receivables related to accrued claims | 5,600 |  | 5,700
Restricted cash | 5,500 |  | 5,000
Investments and other noncurrent assets | $ 4,000 |  | $ 4,000
Fiscal period duration | 364 days |  | 371 days
Non-Current Other Assets |  |  |
Segment Reporting Information [Line Items] |  |  |
Insurance recoveries/receivables related to accrued claims |  |  | $ 5,700
Revenue Recognized Using Cost To Cost Percentage of Completion Method | Maximum |  |  |
Segment Reporting Information [Line Items] |  |  |
Contract revenues | 5.00% | 10.00% |
Stock Options |  |  |
Segment Reporting Information [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  | 4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years |  | 10 years
Performance RSUs |  |  |
Segment Reporting Information [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  | 3 years
Supplemental Shares |  |  |
Segment Reporting Information [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  | 3 years
RSUs |  |  |
Segment Reporting Information [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  | 4 years

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