Discontinued Operations and Divestitures - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) Office Business	Mar. 31, 2015 USD ($) Office Business	Dec. 31, 2014 Office
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of business divestiture | Office	0	0	2
Gain from the sale of its individual wealth management business | $	$ 0.1	$ 0.1
Financial Services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of businesses sold | Business	0	0