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FAIR VALUE - Fair Value of Foreclosed Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017
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Carrying Value | Foreclosed assets remeasured at initial recognition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Foreclosed assets | $ 180 | $ 1,082 | $ 544
Carrying Value | Foreclosed assets remeasured subsequent to initial recognition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Foreclosed assets | 599 | 0 | 0
Charge-offs | Foreclosed assets remeasured at initial recognition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Foreclosed assets | (23) | (195) | (175)
Charge-offs | Foreclosed assets remeasured subsequent to initial recognition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Foreclosed assets | (56) | 0 | 0
Fair Value | Foreclosed assets remeasured at initial recognition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Foreclosed assets | 157 | 887 | 369
Fair Value | Foreclosed assets remeasured subsequent to initial recognition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Foreclosed assets | $ 543 | $ 0 | $ 0

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