Intangible Assets and Goodwill - Components of Company's Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		15 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Net Balance	$ 83,801		$ 83,801	$ 87,670
Amortization expense	5,900	$ 5,200
Franchise agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	180,867		180,867	180,867
Accumulated Amortization	(97,066)		(97,066)	(93,197)
Net Balance	83,801		$ 83,801	87,670
Franchise agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			12 years 6 months
Other intangible assets
Finite Lived Intangible Assets [Line Items]
Initial Cost	45,129		$ 45,129	45,484
Accumulated Amortization	(15,575)		(15,575)	(13,169)
Net Balance	29,554		$ 29,554	32,315
Other intangible assets | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			4 years 4 months 24 days
Software
Finite Lived Intangible Assets [Line Items]
Initial Cost	36,205		$ 36,205	36,680
Accumulated Amortization	(11,506)		(11,506)	(9,653)
Net Balance	24,699		$ 24,699	27,027
Software | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			4 years
Trademarks
Finite Lived Intangible Assets [Line Items]
Initial Cost	2,014		$ 2,014	1,904
Accumulated Amortization	(1,093)		(1,093)	(1,037)
Net Balance	921		$ 921	867
Trademarks | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			9 years
Software Development
Finite Lived Intangible Assets [Line Items]
Capitalized software development costs	5,300		$ 5,300	10,500
Non-compete agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	3,700		3,700	3,700
Accumulated Amortization	(1,857)		(1,857)	(1,546)
Net Balance	1,843		$ 1,843	2,154
Non-compete agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			4 years 6 months
Training materials
Finite Lived Intangible Assets [Line Items]
Initial Cost	2,400		$ 2,400	2,400
Accumulated Amortization	(760)		(760)	(640)
Net Balance	1,640		$ 1,640	1,760
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	810		$ 810	800
Accumulated Amortization	(359)		(359)	(293)
Net Balance	$ 451		$ 451	$ 507
Other | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			3 years 9 months 18 days