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RISK MANAGEMENT AND DERIVATIVE INSTRUMENTS - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Sep. 30, 2015
Interest Rate Swap Maturing on September 27, 2018 | Cash Flow Hedging |  |  |
Derivative [Line Items] |  |  |
Derivatives, notional amount |  | $ 50,000,000 |
Interest Rate Swap Maturing on January 30, 2022 | Cash Flow Hedging |  |  |
Derivative [Line Items] |  |  |
Derivatives, notional amount |  | 25,000,000 |
Interest rate swaps on deposits and other borrowings |  |  |
Derivative [Line Items] |  |  |
Derivatives asset, fair values |  |  | $ 918,000
Loss on derivative instruments | $ 1,400,000 |  |
Net Revenue on Mortgage Banking Activities |  |  |
Derivative [Line Items] |  |  |
Derivatives gain (loss) | $ (6,300,000) | $ (2,700,000) |

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