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COMMITMENTS AND CONTINGENCIES - Off-Balance-Sheet Credit Instruments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Commitments to extend credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract or Notional Amount $ 247,324 $ 243,642
Standby letter of credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Contract or Notional Amount $ 524 $ 3,011