Summary of Company-Operated HomeSmart Store activity (Detail) (HomeSmart)	12 Months Ended
	Dec. 31, 2011 Store	Dec. 31, 2010 Store
HomeSmart
Franchisor Disclosure [Line Items]
Company-operated stores open at January 1,	3
Opened	24	3
Added through acquisition	44
Company-operated stores open at December 31,	71	3