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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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Sum total of loans sold under the mortgage partnership finance program.

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