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Summary of Significant Accounting Policies - Commissions Related to Franchise Sales (Details) - Commissions Related to Franchise Sales
$ in Thousands
6 Months Ended
Jun. 30, 2022
USD ($)
Capitalized Contract Cost [Line Items]  
Balance at beginning of period $ 4,010
Additions to contract cost for new activity 913
Expense recognized (1,026)
Balance at end of period $ 3,897