Discontinued Operations and Divestitures - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2013 Medical Management Professionals Business [Member]	Jul. 26, 2013 Medical Management Professionals Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount related to credit facility debt		$ 40.0
Aggregate Purchase price consideration paid during transaction			201.6
Gain from the sale of its individual wealth management business	2.5
Cash proceed from sale of business and client list	$ 0.9