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Associate Benefit Plan (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Aug. 28, 2021 | Aug. 29, 2020 | Aug. 31, 2019 | Aug. 29, 2015 | Jan. 14, 2015
Associate Stock Purchase Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Plan shares authorized |  |  |  | 1,500 | 1,150
Shares reserved for issuance under plan | 347 |  |  |  |
Maximum number of shares available for purchase per qualified associate | 5 |  |  |  |
Associate purchase price as percent of closing price | 90.00% |  |  |  |
Shares purchased by qualified associates | 57 | 69 |  |  |
Share price | $ 72.87 | $ 59.71 |  |  |
Savings Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Company contributions to savings plan | $ 7,952 | $ 5,491 | $ 8,439 |  |
2005 Omnibus Incentive Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Plan shares authorized | 5,217 |  |  |  |
Shares reserved for issuance under plan | 1,432 |  |  |  |
Stock Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized share-based compensation cost | $ 1,385 |  |  |  |
Unrecognized share-based compensation weighted average period | 9 months 18 days |  |  |  |
Vesting period | 4 years |  |  |  |
Expiration period | 7 years |  |  |  |
Total intrinsic value of options exercised | $ 5,826 | $ 2,604 | $ 1,882 |  |
Performance Share Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized share-based compensation cost | $ 2,479 |  |  |  |
Unrecognized share-based compensation weighted average period | 1 year 8 months 12 days |  |  |  |
Vesting period | 3 years |  |  |  |
Performance Share Units [Member] | Minimum [Member] | Vest After Three Year Performance Period [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage | 0.00% |  |  |  |
Performance Share Units [Member] | Maximum [Member] | Vest After Three Year Performance Period [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage | 200.00% |  |  |  |
Restricted Stock Unit [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized share-based compensation cost | $ 28,433 |  |  |  |
Unrecognized share-based compensation weighted average period | 2 years 7 months 6 days |  |  |  |

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