LOAN PORTFOLIO - Loan Portfolio Held for Investment (Parenthetical) (Detail) (USD $)	3 Months Ended			3 Months Ended
	Mar. 31, 2013	Sep. 30, 2014	Dec. 31, 2013	Jun. 30, 2013 Net increase Commercial Mortgage [Member]	Jun. 30, 2013 Net decrease Commercial And Industrial [Member]	Jun. 30, 2013 Net decrease Construction Loans [Member]
Financial Information [Line Items]
Classified And Non Performing Loans Sold	$ 211,400,000
Reclassification Of Loans				269,000,000	246,800,000	22,200,000
Commercian Loans Collaterized By Real Estate		$ 1,100,000,000	$ 1,200,000,000