Segment Information - Summary of Segment Long-Lived and Total Assets (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Office	Dec. 31, 2014 USD ($)
Segment Long-Lived And Total Assets [Line Items]
Total long-lived assets	$ 250,567	$ 227,561
Total assets	$ 385,313	358,327
Number of owned brokerage offices sold during the period | Office	18
Real Estate Franchise Services
Segment Long-Lived And Total Assets [Line Items]
Total long-lived assets	$ 250,567	222,888
Total assets	384,959	349,481
Brokerages
Segment Long-Lived And Total Assets [Line Items]
Total long-lived assets		4,673
Total assets	$ 354	$ 8,846