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Basis Of Presentation (Details) |  | 1 Months Ended | 3 Months Ended | 5 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2019 USD ($) | Apr. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2020 | Jul. 05, 2020 USD ($) restaurant | Jul. 07, 2019 USD ($) restaurant | Feb. 29, 2020 | Jul. 05, 2020 USD ($) segment restaurant | Jul. 07, 2019 USD ($) restaurant | Sep. 29, 2019 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Number of restaurants | restaurant |  |  |  |  | 2,244 | 2,242 |  | 2,244 | 2,242 |
Number of operating segments | segment |  |  |  |  |  |  |  | 1 |  |
Business outside of dining rooms (percent) |  |  |  |  |  |  |  | 90.00% |  |
Contractual obligation (percent) |  |  | 4.00% |  |  |  | 5.00% |  |  |
Collection period for marketing fees |  |  | 24 months |  |  |  |  |  |  |
Incremental Corporate Advertising Contributions |  |  |  |  |  |  |  | $ 0 | $ 2,000,000.0 |
Marketing and advertising expense |  |  |  |  | $ 3,900,000 | $ 4,000,000.0 |  | 12,800,000 | 15,000,000.0 |
Restricted cash |  |  |  |  | 37,400,000 |  |  | 37,400,000 |  | $ 26,000,000.0
Straight-line rent accrual | $ 29,000,000.0 |  |  |  |  |  |  |  |  |
Unfavorable lease liabilities | 2,100,000 |  |  |  |  |  |  |  |  |
Exit-related lease liabilities | 19,400,000 |  |  |  |  |  |  |  |  |
Favorable lease assets | 400,000 |  |  |  |  |  |  |  |  |
Cumulative-effect from a change in accounting principle | $ (2,900,000) |  |  |  | 0 | $ 0 |  | (2,870,000) | $ (37,330,000) |
Uncollected Postponed Marketing Fees |  |  |  |  | 16,200,000 |  |  | 16,200,000 |  |
Accounts Receivable [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Uncollected Postponed Marketing Fees |  |  |  |  | 10,300,000 |  |  | 10,300,000 |  |
Other Current Assets [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Uncollected Postponed Marketing Fees |  |  |  |  | $ 5,900,000 |  |  | $ 5,900,000 |  |
Forecast |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Collection period for marketing fees |  |  |  | 3 months |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual obligation (percent) |  | 2.00% |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual obligation (percent) |  | 4.00% |  |  |  |  |  |  |  |
Entity Operated Units |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Number of restaurants | restaurant |  |  |  |  | 144 | 137 |  | 144 | 137 |
Franchised Units |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Number of restaurants | restaurant |  |  |  |  | 2,100 | 2,105 |  | 2,100 | 2,105 |

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