Intangible Assets and Goodwill - Components of Company's Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Net Balance	$ 103,780,000		$ 109,140,000
Amortization expense	5,800,000	$ 3,514,000
Franchise agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	224,167,000		224,167,000
Accumulated Amortization	(120,387,000)		(115,027,000)
Net Balance	$ 103,780,000		109,140,000
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	$ 18,933,000		18,809,000
Accumulated Amortization	(9,437,000)		(8,998,000)
Net Balance	$ 9,496,000		9,811,000
Other Intangible Assets | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	7 years 10 months 24 days
Software and Software Development Costs
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 13,314,000		13,207,000
Accumulated Amortization	(7,484,000)		(7,154,000)
Net Balance	$ 5,830,000		6,053,000
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	$ 3,119,000		3,102,000
Accumulated Amortization	(1,828,000)		(1,782,000)
Net Balance	$ 1,291,000		1,320,000
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]
Initial Cost	$ 559,000		356,000
Non-compete
Finite Lived Intangible Assets [Line Items]
Initial Cost	2,500,000		2,500,000
Accumulated Amortization	(125,000)		(62,000)
Net Balance	$ 2,375,000		$ 2,438,000
Non-compete | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	10 years