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Restaurant Impairments, Closure Costs and Asset Disposals - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended
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Apr. 30, 2024 restaurant | Sep. 30, 2025 restaurant | Oct. 01, 2024 USD ($) restaurant | Sep. 30, 2025 USD ($) restaurant | Oct. 01, 2024 USD ($) restaurant
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |  |
Number of restaurants impaired | restaurant |  | 9 |  | 24 | 12
Number of restaurants with lease related assets written down | restaurant |  | 9 | 1 | 20 | 5
Fixed asset impairment charges | $ |  |  | $ 0 |  |
Number of restaurants closed | restaurant |  | 15 | 5 | 24 | 7
Increase to accrual for early lease terminations, partially offset by gains from lease remeasurements | $ |  |  |  | $ 600 | $ 500
Offset adjustment to closure costs related to lease terminations | $ |  |  |  | $ 1,800 | $ (800)
Number of restaurants sold to a franchisee | restaurant | 6 |  |  |  |
Gain (loss) on disposal | $ |  |  | $ 500 |  |

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