Goodwill and Other Intangible Assets, Net - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill And Intangible Assets [Line Items]
Intangible amortization expense	$ 5,500,000	$ 3,600,000	$ 3,500,000
Real Estate Services [Member]
Goodwill And Intangible Assets [Line Items]
Measurement period adjustments	(1,693,000)
Financial Services [Member]
Goodwill And Intangible Assets [Line Items]
Measurement period adjustments	$ (83,000)