Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVES (Narrative) (Details)

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DERIVATIVES (Narrative) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Derivatives, Fair Value [Line Items]      
Carrying Amount of Hedged Asset/(Liabilities) $ 50,000,000   $ 50,000,000
Cash Flow Hedging      
Derivatives, Fair Value [Line Items]      
Unrealized gain (loss) within accumulated other comprehensive income, to be reclassified into earnings 1,800,000 $ (1,800,000)  
Derivative, amount 200,000,000    
Fair Value Hedging      
Derivatives, Fair Value [Line Items]      
Aggregate notional amount of the hedged items 121,300,000   74,700,000
Fair value of aggregate notional amount of the hedged items, unrealized loss 672,000   5,100,000
Loans      
Derivatives, Fair Value [Line Items]      
Carrying Amount of Hedged Asset/(Liabilities) 121,323,000   74,726,000
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities) 598,000   5,088,000
Available-for-sale Securities      
Derivatives, Fair Value [Line Items]      
Fair value of aggregate notional amount of the hedged items, unrealized loss 5,100,000   7,300,000
Carrying Amount of Hedged Asset/(Liabilities) 150,545,000   166,413,000
Cumulative Amount of Basis Adjustments Included in the Carrying Amount of the Hedged Asset/(Liabilities) 5,115,000   7,297,000
Available-for-sale Securities | Fair Value Hedging      
Derivatives, Fair Value [Line Items]      
Aggregate notional amount of the hedged items 50,000,000   50,000,000
Fair value of aggregate notional amount of the hedged items, unrealized loss $ 5,100,000   $ 7,300,000