Intangible Assets and Goodwill - Components of Company's Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Net Balance	$ 99,036		$ 99,036		$ 109,140
Amortization expense	5,189	$ 3,656	10,989	$ 7,170
Franchise agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	193,877		193,877		224,167
Accumulated Amortization	(94,841)		(94,841)		(115,027)
Net Balance	99,036		$ 99,036		109,140
Franchise agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			12 years 2 months 12 days
Other Intangible Assets
Finite Lived Intangible Assets [Line Items]
Initial Cost	19,214		$ 19,214		18,809
Accumulated Amortization	(9,882)		(9,882)		(8,998)
Net Balance	9,332		$ 9,332		9,811
Other Intangible Assets | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			7 years 9 months 18 days
Software and Software Development Costs
Finite Lived Intangible Assets [Line Items]
Initial Cost	13,577		$ 13,577		13,207
Accumulated Amortization	(7,821)		(7,821)		(7,154)
Net Balance	5,756		$ 5,756		6,053
Software and Software Development Costs | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			4 years 7 months 6 days
Trademarks
Finite Lived Intangible Assets [Line Items]
Initial Cost	3,137		$ 3,137		3,102
Accumulated Amortization	(1,874)		(1,874)		(1,782)
Net Balance	1,263		$ 1,263		1,320
Trademarks | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			14 years 2 months 12 days
Software Development
Finite Lived Intangible Assets [Line Items]
Software development costs, not yet completed	742		$ 742		356
Non-compete
Finite Lived Intangible Assets [Line Items]
Initial Cost	2,500		2,500		2,500
Accumulated Amortization	(187)		(187)		(62)
Net Balance	$ 2,313		$ 2,313		$ 2,438
Non-compete | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets			10 years