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Revenues - (Deferred Revenue) (Details)
$ in Thousands
Dec. 30, 2020
USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Deferred franchise revenue expected to be recognized $ 20,806
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Deferred franchise revenue expected to be recognized $ 1,997
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-12-30  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Deferred franchise revenue expected to be recognized $ 1,893
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-12-29  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Deferred franchise revenue expected to be recognized $ 1,812
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-12-28  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Deferred franchise revenue expected to be recognized $ 1,760
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-12-26  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Deferred franchise revenue expected to be recognized $ 1,690
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]  
Deferred franchise revenue expected to be recognized $ 11,654
Revenue, remaining performance obligation, expected timing of satisfaction, period