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Basis Of Presentation (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Apr. 11, 2021 USD ($) restaurant | Apr. 12, 2020 USD ($) restaurant | Apr. 11, 2021 USD ($) restaurant segment | Apr. 12, 2020 USD ($) restaurant | Sep. 27, 2020 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of restaurants | restaurant | 2,228 | 2,246 | 2,228 | 2,246 |
Number of operating segments | segment |  |  | 1 |  |
Contractual obligation (percent) |  |  | 5.00% |  |
Marketing and advertising expense | $ 4,300 | $ 3,500 | $ 10,100 | $ 8,900 |
Restricted cash | 18,100 |  | 18,100 |  | $ 37,300
Uncollected Postponed Marketing Fees | 5,500 |  | 5,500 |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  |  | (5,541) |  |
Provision for Other Credit Losses |  |  | (476) |  |
Accounts Receivable, Allowance for Credit Loss, Writeoff |  |  | 19 |  |
Accounts Receivable, Allowance for Credit Loss, Current | (5,998) |  | (5,998) |  |
Uncollected Postponed Marketing Fees | 5,500 |  | 5,500 |  |
Accounts Receivable [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Uncollected Postponed Marketing Fees | 4,400 |  | 4,400 |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Uncollected Postponed Marketing Fees | 4,400 |  | 4,400 |  |
Other Noncurrent Assets [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Uncollected Postponed Marketing Fees | 1,100 |  | 1,100 |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Uncollected Postponed Marketing Fees | $ 1,100 |  | $ 1,100 |  |
Entity Operated Units |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of restaurants | restaurant | 148 | 144 | 148 | 144 |
Franchised Units |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of restaurants | restaurant | 2,080 | 2,102 | 2,080 | 2,102 |

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