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DERIVATIVES (Narrative) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) derivative | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Derivatives, Fair Value [Line Items] |  |  |
Carrying Amount of Hedged Asset/(Liabilities) |  | $ 50,000 | $ 50,000
Cash Flow Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Number of interest rate derivatives terminated | derivative | 4 |  |
Cash Flow Hedging | Operating Income (Loss) [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Unrealized gain within accumulated other comprehensive income, to be reclassified into earnings | $ 9,000 |  |
Loans |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Carrying Amount of Hedged Asset/(Liabilities) |  | 83,078 | 87,596
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities) |  | 1,972 | (1,572)
Loans | Fair Value Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Aggregate notional amount of the hedged items |  | 83,100 | 87,600
Fair value of aggregate notional amount of the hedged items, unrealized loss |  | (2,000) | (1,600)
Available-for-sale Securities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Carrying Amount of Hedged Asset/(Liabilities) |  | 206,799 | 224,241
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities) |  | 4,072 | 1,399
Available-for-sale Securities | Fair Value Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Aggregate notional amount of the hedged items |  | 50,000 | 50,000
Fair value of aggregate notional amount of the hedged items, unrealized loss |  | (4,100) | (1,400)
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities) |  | $ 4,100 | $ 1,400

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