Intangible Assets and Goodwill - Components of Company's Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Franchise agreements, net of accumulated amortization	$ 78,897	$ 89,071
Other intangible assets, net of accumulated amortization	1,976	2,486
Franchise Agreements
Finite Lived Intangible Assets [Line Items]
Initial Weighted Average Amortization Period (in years)	12 years
Initial Cost	162,835	162,835
Accumulated Amortization	(83,938)	(73,764)
Franchise agreements, net of accumulated amortization	78,897	89,071
Software
Finite Lived Intangible Assets [Line Items]
Initial Weighted Average Amortization Period (in years)	4 years 2 months 12 days
Initial Cost	7,500	7,463
Accumulated Amortization	(7,014)	(6,633)
Other intangible assets, net of accumulated amortization	486	830
Trademarks
Finite Lived Intangible Assets [Line Items]
Initial Weighted Average Amortization Period (in years)	14 years 9 months 18 days
Initial Cost	2,870	2,935
Accumulated Amortization	(1,380)	(1,279)
Other intangible assets, net of accumulated amortization	1,490	1,656
Other Intangible Assets
Finite Lived Intangible Assets [Line Items]
Initial Weighted Average Amortization Period (in years)	7 years 1 month 6 days
Initial Cost	10,370	10,398
Accumulated Amortization	(8,394)	(7,912)
Other intangible assets, net of accumulated amortization	$ 1,976	$ 2,486