Intangible Assets and Goodwill - Components of Company's Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Net Balance	$ 143,832	$ 69,802
Amortization expense	29,100	24,400	$ 20,100
Franchise agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	267,770	176,354
Accumulated Amortization	(123,938)	(106,552)
Net Balance	$ 143,832	69,802
Franchise agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	12 years 8 months 12 days
Other Intangible Assets
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 70,894	54,704
Accumulated Amortization	(38,364)	(24,735)
Net Balance	$ 32,530	29,969
Other Intangible Assets | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	4 years 6 months
Software
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 51,368	44,389
Accumulated Amortization	(29,682)	(18,926)
Net Balance	$ 21,686	25,463
Software | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	4 years 1 month 6 days
Software Development
Finite Lived Intangible Assets [Line Items]
Capitalized software development costs	$ 1,900	1,400
Trademarks
Finite Lived Intangible Assets [Line Items]
Initial Cost	2,356	2,325
Accumulated Amortization	(1,533)	(1,274)
Net Balance	$ 823	1,051
Trademarks | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	8 years 3 months 18 days
Non-compete agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 13,100	3,920
Accumulated Amortization	(4,563)	(2,814)
Net Balance	$ 8,537	1,106
Non-compete agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	5 years
Training materials
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 2,400	2,400
Accumulated Amortization	(1,600)	(1,120)
Net Balance	$ 800	1,280
Training materials | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	5 years
Other..
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 1,670	1,670
Accumulated Amortization	(986)	(601)
Net Balance	$ 684	$ 1,069
Other.. | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	6 years 7 months 6 days