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Financing Obligations (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2008
termExtensionOption
Dec. 31, 2020
USD ($)
realProperty
Dec. 31, 2019
USD ($)
Jun. 13, 2008
USD ($)
May 19, 2008
realProperty
Minimum Lease Payments, Sale Leaseback Transactions, Fiscal Year Maturity [Abstract]          
2021   $ 15,900      
2022   14,500      
2023   11,700      
2024   9,700      
2025   8,600      
Thereafter   50,900      
Total minimum lease payments   111,300      
Less: interest/imputed interest   (31,700)      
Total obligations   79,600      
Less: current portion   (10,600)      
Finance lease obligations, less current maturities   $ 69,012 $ 77,393    
Sale Leaseback Transaction Agreement for Properties          
Sale Leaseback Transaction [Line Items]          
Parcels of real property under sale leaseback transaction | realProperty         181
Master Lease Agreement          
Sale Leaseback Transaction [Line Items]          
Parcels of real property under sale leaseback transaction | realProperty   181      
Gross proceeds of sale leaseback transaction       $ 337,200  
Sale leaseback initial term 20 years        
Number of options to extend initial leaseback term | termExtensionOption 4        
Extension period for options to extend sale leaseback initial term (in years) 5 years        
Properties assigned to franchisee or released from lessor | realProperty   158      
Reduction in property and equipment and financing obligations as a result of sales transactions   $ 284,200      
Sale-Leaseback Transactions          
Minimum Lease Payments, Sale Leaseback Transactions, Fiscal Year Maturity [Abstract]          
2021   4,500      
2022   4,500      
2023   4,400      
2024   5,000      
2025   5,000      
Thereafter   34,800      
Total minimum lease payments   58,200      
Less: interest/imputed interest   (24,700)      
Total obligations   33,500      
Less: current portion   (700)      
Finance lease obligations, less current maturities   $ 32,800