Acquisitions - Summary of Estimated Fair Value of Assets Acquired at Acquisition Date (Detail) (RMCO, USD $)			12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2012 RE/MAX of Texas
Business Acquisition [Line Items]
Accounts and notes receivable, net			$ 122,000
Franchise agreements			15,200,000
Goodwill	70,902,000	71,039,000	30,178,000
Total purchase price			$ 45,500,000