Revenues - Deferred Revenue (Details) $ in Thousands	Sep. 25, 2019 USD ($)
Revenues [Abstract]
Deferred franchise revenue expected to be recognized	$ 23,257
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-09-26
Revenues [Abstract]
Deferred franchise revenue expected to be recognized	$ 583
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred franchise revenue expected to be recognized, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-12-26
Revenues [Abstract]
Deferred franchise revenue expected to be recognized	$ 2,204
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred franchise revenue expected to be recognized, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-27
Revenues [Abstract]
Deferred franchise revenue expected to be recognized	$ 2,017
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred franchise revenue expected to be recognized, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-12-28
Revenues [Abstract]
Deferred franchise revenue expected to be recognized	$ 1,908
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred franchise revenue expected to be recognized, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-12-29
Revenues [Abstract]
Deferred franchise revenue expected to be recognized	$ 1,830
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred franchise revenue expected to be recognized, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-12-30
Revenues [Abstract]
Deferred franchise revenue expected to be recognized	$ 14,715
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred franchise revenue expected to be recognized, period