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Discontinued Operations and Divestitures - Additional Information (Detail) $ in Millions		1 Months Ended	6 Months Ended
	Jun. 01, 2015 Business	Dec. 31, 2014 Office	Jun. 30, 2016 USD ($) Office	Jun. 30, 2015 USD ($) Office
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of business divestiture			0	0
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 business divestiture		2
Number of businesses sold \| Business	1