Intangible Assets and Goodwill - Components of Company's Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Net Balance	$ 109,140,000	$ 61,939,000
Amortization expense	15,226,000	14,079,000	$ 14,206,000
Franchise agreements
Finite Lived Intangible Assets [Line Items]
Initial Cost	224,167,000	162,438,000
Accumulated Amortization	(115,027,000)	(100,499,000)
Net Balance	$ 109,140,000	61,939,000
Franchise agreements | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	11 years 7 months 6 days
Other Intangible Assets
Finite Lived Intangible Assets [Line Items]
Initial Cost	$ 18,809,000	13,870,000
Accumulated Amortization	(8,998,000)	(8,929,000)
Net Balance	$ 9,811,000	4,941,000
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	$ 13,207,000	10,885,000
Accumulated Amortization	(7,154,000)	(7,325,000)
Net Balance	$ 6,053,000	3,560,000
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	$ 3,102,000	2,985,000
Accumulated Amortization	(1,782,000)	(1,604,000)
Net Balance	$ 1,320,000	1,381,000
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	$ 356,000	$ 3,165,000
Non-compete
Finite Lived Intangible Assets [Line Items]
Initial Cost	2,500,000
Accumulated Amortization	(62,000)
Net Balance	$ 2,438,000
Non-compete | Weighted Average
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	10 years