LOAN PORTFOLIO - Loan Portfolio Held for Investment (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Sep. 30, 2016	Dec. 31, 2015
Financial Information [Line Items]
Classified And Non Performing Loans Sold	$ 147.5
Commercian Loans Collaterized By Real Estate		$ 949.9	$ 1,000.0