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DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
broker
swap
customer
Sep. 30, 2021
USD ($)
swap
Sep. 30, 2022
USD ($)
broker
swap
customer
Sep. 30, 2021
USD ($)
swap
Dec. 31, 2021
USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Third-party broker | broker 21   21    
Number of new interest rate swaps | swap 4 1 9 2  
Swap fee income $ 197,000 $ 67,000 $ 1,935,000 $ 135,000  
Cash collateral held by counterparty for derivatives 5,800,000   5,800,000   $ 260,000
Cash collateral held from counterparties 9,800,000   9,800,000   490,000
Upfront fee from derivative 0   0    
Interest rate derivative | Derivatives not designated as hedging instruments:          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative, notional amount $ 206,400,000   $ 206,400,000   75,800,000
Number of customers | customer 21   21    
Risk participation agreements          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Derivative liability $ 15,900,000   $ 15,900,000   15,900,000
Derivative asset $ 5,000,000   $ 5,000,000   $ 0
Risk participation agreements | Agent Bank          
Derivative Instruments and Hedging Activities Disclosures [Line Items]          
Upfront fee from derivative   $ 0   $ 53,000