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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Narrative (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Fair Value Disclosures [Abstract] |  |
Reserve in other liabilities | $ 816 | $ 784
MPF Program |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total outstanding balance of loans sold under the MPF Program | 31,977 | 35,678
Limited recourse back on loans | $ 1,135 | $ 1,029

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