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DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
bank
customer
Jun. 30, 2021
USD ($)
bank
Jun. 30, 2022
USD ($)
bank
customer
Jun. 30, 2021
USD ($)
bank
Dec. 31, 2021
USD ($)
bank
Sep. 30, 2021
USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]            
Third-party broker | bank 17   17      
Number of new interest rate swaps | bank 3 1 5 2    
Swap fee income $ 785,000 $ 15,000 $ 1,738,000 $ 68,000    
Cash collateral held by counterparty for derivatives 2,700,000   2,700,000   $ 260,000  
Cash collateral held from counterparties $ 6,100,000   $ 6,100,000   $ 490,000  
Interest rate derivative            
Derivative Instruments and Hedging Activities Disclosures [Line Items]            
Number of derivatives | bank 0   0   0  
Interest rate derivative | Derivatives not designated as hedging instruments:            
Derivative Instruments and Hedging Activities Disclosures [Line Items]            
Number of customers | customer 17   17      
Derivative, notional amount $ 183,500,000   $ 183,500,000   $ 75,800,000  
Interest rate derivative | Designated as hedging instrument            
Derivative Instruments and Hedging Activities Disclosures [Line Items]            
Derivative liability           $ 50,000,000
Risk participation agreement            
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 agreement | Agent Bank            
Derivative Instruments and Hedging Activities Disclosures [Line Items]            
Upfront fee from derivative   $ 0   $ 53,000