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Franchise Rights (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Jun. 28, 2020
Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]        
Franchise agreement, term     20 years  
Franchise RIghts Rollforward [Abstract]        
Balance, beginning     $ 348,941  
Amortization of intangible assets, franchise rights $ (3,400) $ (2,000) (7,340) $ (4,100)
Balance, end 341,601   341,601  
Franchise Rights [Member]        
Finite-Lived Intangible Assets [Line Items]        
Impairment of intangible assets (excluding goodwill) 0     $ 0
Franchise RIghts Rollforward [Abstract]        
Amortization expense, expected for full fiscal period 14,300   14,300  
Second Fiscal Year 13,700   13,700  
Third Fiscal Year 13,700   13,700  
Fourth Fiscal Year 13,700   13,700  
Fifth Fiscal Year $ 13,700   $ 13,700