Intangible Assets and Goodwill - Components of Company's Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Finite Lived Intangible Assets [Line Items]
Net Balance	$ 87,346		$ 87,346		$ 101,516
Amortization expense	6,600	$ 7,600	20,700	$ 22,400
Franchise agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	224,726		224,726		225,716
Accumulated Amortization	(137,380)		(137,380)		(124,200)
Net Balance	$ 87,346		$ 87,346		$ 101,516
Franchise agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	11 years 9 months 18 days		11 years 9 months 18 days		11 years 9 months 18 days
Other Intangible Assets
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 73,867		$ 73,867		$ 70,210
Accumulated Amortization	(58,570)		(58,570)		(51,034)
Net Balance	$ 15,297		$ 15,297		$ 19,176
Other Intangible Assets | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	4 years 6 months		4 years 6 months		4 years 6 months
Software
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 56,643		$ 56,643		$ 52,918
Accumulated Amortization	(44,926)		(44,926)		(39,192)
Net Balance	$ 11,717		$ 11,717		$ 13,726
Software | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	4 years 1 month 6 days		4 years 1 month 6 days		4 years 1 month 6 days
Software Development
Finite Lived Intangible Assets [Line Items]
Capitalized software development costs	$ 1,100		$ 1,100		$ 1,000
Trademarks
Finite Lived Intangible Assets [Line Items]
Initial Cost	992		992		971
Accumulated Amortization	(745)		(745)		(649)
Net Balance	$ 247		$ 247		$ 322
Trademarks | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	9 years 1 month 6 days		9 years 1 month 6 days		9 years 1 month 6 days
Non-compete agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 12,962		$ 12,962		$ 13,051
Accumulated Amortization	(9,687)		(9,687)		(8,156)
Net Balance	$ 3,275		$ 3,275		$ 4,895
Non-compete agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	5 years		5 years		5 years
Training materials
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 2,400		$ 2,400		$ 2,400
Accumulated Amortization	$ (2,400)		$ (2,400)		$ (2,400)
Training materials | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	0 years		0 years		0 years
Other
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 870		$ 870		$ 870
Accumulated Amortization	(812)		(812)		(637)
Net Balance	$ 58		$ 58		$ 233
Other | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	7 years		7 years		7 years