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INCOME TAXES - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Jan. 01, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Jun. 30, 2016 | Sep. 30, 2016 | Sep. 30, 2015
Income Tax Disclosure [Abstract] |  |  |  |  |  |
Income tax expense related to net securities gains |  | $ 0 | $ 10,000 |  | $ 483,000 | $ 669,000
Federal statutory rate | 34.00% | 35.00% |  |  |  |
Increase (decrease) in deferred income tax expense |  | $ (59,000) |  | $ 235,000 | $ 176,000 |

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