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INVESTMENT SECURITIES - Additional Information (Detail)
$ in Millions
Mar. 31, 2016
USD ($)
security
Dec. 31, 2015
USD ($)
Investments, Debt and Equity Securities [Abstract]    
Securities available for sale, pledged | $ $ 324.0 $ 47.9
Securities available for sale portfolio 158  
Available for sale securities in unrealized loss position 60  
Securities held to maturity portfolio 93  
Held to maturity securities in unrealized loss position 62