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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)
 12 Months Ended
Dec. 31, 2024
USD ($)
loan
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accrued interest receivable on loans $ 8,000,000.0 $ 7,800,000  
Loans, net of deferred loan fees 2,071,419,000 1,972,664,000  
Residential mortgages held for sale 0 0  
Allowance for credit losses 21,388,000 22,517,000 $ 19,659,000
Loans individually analyzed $ 6,471,000 8,035,000  
Number of days past due after which a retail loan is rated 90 days    
Collateral Pledged      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for credit losses $ 171,000 267,000  
Loans individually analyzed 5,089,000 6,347,000  
Commercial, Industrial And Agricultural Sector      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans, net of deferred loan fees 300,000 300,000  
Commercial and industrial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans, net of deferred loan fees 299,521,000 264,396,000  
Residential Mortgages and Home Equity Loans | Asset Pledged as Collateral      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Financial instruments, owned, at fair value 244,600,000 254,600,000  
Commercial and Industrial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans, net of deferred loan fees 299,521,000 264,396,000  
Allowance for credit losses 4,520,000 5,055,000 $ 3,373,000
Loans individually analyzed $ 1,512,000 2,067,000  
Commercial and Industrial | Commercial and industrial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Number of contracts modified | loan 1    
Allowance for credit losses $ 700,000 $ 900,000