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Revenue Recognition - Franchise fees (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Disaggregation of Revenue [Line Items]        
Earned franchise fees     $ 3,600 $ 3,500
Franchising        
Disaggregation of Revenue [Line Items]        
Earned franchise fees     400 500
Franchising        
Disaggregation of Revenue [Line Items]        
Earned franchise fees $ 117 $ 198 $ 390 $ 514