Summary of Significant Accounting Policies - Leases (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 lease
Leases
Number of franchisees' leases recognized by the Company | lease					0
ROU Assets written off		$ 2,700
Operating lease liability derecognized		1,500
Loss on termination recognized		(2,500)		$ (2,460)
Cash paid for lease termination		$ 1,300
Impairment charge - leased assets	$ 2,513		$ 3,700	$ 6,248