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FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK (Outstanding following off-balance-sheet financial instruments) (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fixed Rate $ 93,804 $ 89,664
Variable Rate 343,546 346,115
Unused commitments    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fixed Rate 43,628,000 39,676,000
Variable Rate 343,546,000 346,115,000
Standby and commercial letters of credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Fixed Rate 50,176,000 49,988,000
Variable Rate $ 0 $ 0