Summary of Estimated Fair Value of Assets Acquired at Acquisition Date (Detail) (USD $)	1 Months Ended			1 Months Ended
	Oct. 07, 2013 Franchise Agreements Subsequent Event	Sep. 30, 2013 RMCO	Dec. 31, 2012 RMCO	Oct. 07, 2013 RMCO Franchise Agreements Subsequent Event
Subsequent Event [Line Items]
Accounts and notes receivable, net				$ 1,340,000
Other current assets				23,000
Franchise agreements				23,008,000
Goodwill		70,902,000	71,039,000	3,179,000
Other assets				15,000
Accrued liabilities				(260,000)
Total purchase price	$ 27,305,000			$ 27,305,000