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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Reserve for off-balance sheet credit exposures	$ 905	$ 784
Mortgage Partnership Finance Program
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Sum of total loans sold under the MPF Program	33,561	35,678
Limited recourse debt	$ 1,135	$ 1,029

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Concentration risk credit risk financial instrument maximum exposure liability.

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Limited recourse debt.

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

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