Intangible Assets and Goodwill - Components of Company's Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Finite Lived Intangible Assets [Line Items]
Net Balance	$ 95,841		$ 101,516
Amortization expense	7,200	$ 7,400
Franchise agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	224,566		225,716
Accumulated Amortization	(128,725)		(124,200)
Net Balance	$ 95,841		$ 101,516
Franchise agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	12 years 1 month 6 days		12 years 1 month 6 days
Other Intangible Assets
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 71,689		$ 70,210
Accumulated Amortization	(53,563)		(51,034)
Net Balance	$ 18,126		$ 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
Software
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 54,498		$ 52,918
Accumulated Amortization	(41,000)		(39,192)
Net Balance	$ 13,498		$ 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
Software Development
Finite Lived Intangible Assets [Line Items]
Capitalized software development costs	$ 2,100		$ 1,000
Trademarks
Finite Lived Intangible Assets [Line Items]
Initial Cost	973		971
Accumulated Amortization	(681)		(649)
Net Balance	$ 292		$ 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
Non-compete agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 12,948		$ 13,051
Accumulated Amortization	(8,786)		(8,156)
Net Balance	$ 4,162		$ 4,895
Non-compete agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	5 years		5 years
Training materials
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 2,400		$ 2,400
Accumulated Amortization	$ (2,400)		$ (2,400)
Training materials | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	0 years		0 years
Other
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 870		$ 870
Accumulated Amortization	(696)		(637)
Net Balance	$ 174		$ 233
Other | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	7 years		7 years