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ALLOWANCE FOR CREDIT LOSSES - LOANS - Additional information (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Provision (Credit)                 $ 6,563,000 $ 50,000 $ 1,100,000
Provision for credit losses $ 6,018,000 $ 189,000 $ 43,000 $ 1,179,000 $ 275,000 $ 500,000 $ (325,000) $ (400,000) 7,429,000 50,000 1,100,000
Net loan charge-offs                 $ 3,500,000 $ 1,700,000  
Percentage of charge-offs                 0.35% 0.17%  
Percentage Of Allowance For Total Loans 1.45%       1.08%       1.45% 1.08%  
Evaluated for impairment $ 150,000               $ 150,000    
Percentage of coverage on non-performing assets 121.00%       207.00%       121.00% 207.00%  
Percentage of general reserve 49.00%                    
Percentage of quantitative reserve 51.00%                    
Non-performing assets $ 12,167,000               $ 12,167,000    
Current period gross charge-offs, Total                 3,641,000 $ 1,849,000 294,000
Residential Real Estate                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Other assets 15,000       $ 38,000       15,000 38,000  
Residential Mortgages                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Mortgage loans in process of foreclosure, amount 332,000               332,000    
Non-performing                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Total non-performing assets 12,393,000       5,200,000       12,393,000 5,200,000  
Other commercial real estate (non-owner occupied)                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Non-performing assets 8,780,000               8,780,000    
Current period gross charge-offs, Total 804,000                    
Other commercial real estate (non-owner occupied) | Non-performing                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Total non-performing assets 8,780,000               8,780,000    
Commercial real estate (non-owner occupied)                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Non-performing assets         1,586,000         1,586,000  
Commercial real estate (non-owner occupied) | COVID 19                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Allowance for loan losses                   916,000 968,000
Consumer                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Non-performing assets         9,000         9,000  
Consumer and Residential Mortgage Loans                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Minimum aggregate balances for commercial loan relationship under structure loan rating process. 250,000               250,000    
Other commercial and industrial                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Provision (Credit)                 599,000    
Non-performing assets 1,694,000       $ 1,989,000       1,694,000 1,989,000  
Current period gross charge-offs, Total                 480,000    
Other commercial and industrial | Non-performing                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Total non-performing assets 1,905,000               1,905,000    
Pass                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Minimum individual loan balance requiring quarterly review 2,000,000               2,000,000    
Special Mention                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Minimum individual loan balance requiring quarterly review 250,000               250,000    
Substandard                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Minimum individual loan balance requiring quarterly review 250,000               250,000    
Doubtful                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Minimum individual loan balance requiring quarterly review 100,000               100,000    
Commercial                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Current period gross charge-offs, Total                 3,312,000    
Commercial | COVID 19                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Allowance for loan losses                   325,000 (344,000)
Commercial | Commercial                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Provision (Credit)                   (325,000) (344,000)
Minimum aggregate balances for commercial loan relationship under structure loan rating process 1,000,000               1,000,000    
Current period gross charge-offs, Total                   97,000 146,000
Commercial | Commercial real estate (non-owner occupied) - retail                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Provision (Credit)                 4,084,000    
Net loan charge-offs                 2,000,000.0    
Current period gross charge-offs, Total                 2,028,000    
Commercial | Other commercial real estate (non-owner occupied)                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Provision (Credit)                 1,022,000    
Net loan charge-offs                 804,000    
Current period gross charge-offs, Total                 $ 804,000    
Commercial | Commercial real estate (non-owner occupied)                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Provision (Credit)                   916,000 968,000
Current period gross charge-offs, Total                   1,390,000  
Commercial | Commercial                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Minimum percent of portfolio to be reviewed                 25.00%    
Minimum aggregate balances for commercial loan relationship under structure loan rating process. 1,000,000               $ 1,000,000    
Commercial | Other commercial and industrial                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Current period gross charge-offs, Total 405,000               480,000    
Consumer.                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Current period gross charge-offs, Total                 329,000    
Consumer. | Consumer                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Provision (Credit)                 499,000 239,000 71,000
Non-performing assets 788,000               788,000    
Current period gross charge-offs, Total                 275,000 $ 334,000 $ 131,000
Consumer. | Consumer | Non-performing                      
Accounts, Notes, Loans and Financing Receivable [Line Items]                      
Total non-performing assets $ 788,000               $ 788,000