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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Reserve for off-balance sheet credit exposures $ 1,800 $ 1,500
Home equity lines of credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitments to fund 232,270 223,216
1-4 family residential construction loans    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitments to fund 28,157 28,928
Commercial real estate, construction and land development loans    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitments to fund 62,120 60,606
Commercial, industrial and other loans    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitments to fund 290,069 268,931
Standby letters of credit    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Commitments to fund $ 14,612 $ 14,491