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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Narrative (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Fair Value Disclosures [Abstract] |  |
Reserve for off-balance sheet credit exposures | $ 965 | $ 816
Mortgage Partnership Finance Program |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Sum of total loans sold under the MPF Program | 30,342 | 31,977
Limited recourse debt | $ 1,135 | $ 1,135

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- Definition Sum total of loans sold under the mortgage partnership finance program. + References No definition available. + Details
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