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FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK (Outstanding following off-balance-sheet financial instruments) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fixed Rate $ 68,428 $ 53,288
Variable Rate 272,649 266,696
Undrawn lines of credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fixed Rate 20,805 19,024
Variable Rate 272,649 266,696
Letters of credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fixed Rate 47,623 34,264
Variable Rate $ 0 $ 0