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Stockholders' Equity And Stock-Based Compensation (Summary Of Information On Performance-Based Restricted Stock Units Granted To Executive Officers That Have Not Yet Vested) (Details) - Executive Officer - Performance-Based Restricted Stock Units - shares |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Dec. 15, 2023 | Dec. 15, 2022 | Dec. 15, 2021 | Dec. 29, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Aggregate Shares Granted at Target Award (in shares) | 77,283 | 90,613 | 60,301 |
Percentage of target award |  |  |  | 200.00%
Potential shares at vest date (in shares) | 154,566 | 181,226 | 120,602 |

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