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BORROWED FUNDS - Narrative (Details) - USD ($)
 1 Months Ended 9 Months Ended
Jun. 30, 2022
Sep. 30, 2012
Sep. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]        
Line of credit, current     $ 3,000,000  
Short-term debt     0 $ 0
Long-term borrowings     125,495,000 110,844,000
Variable-rate FHLB advances     0 0
Advances from the FHLB        
Debt Instrument [Line Items]        
Long-term line of credit     0 0
Line of credit facility, remaining borrowing capacity     1,200,000,000 1,500,000,000
Short-term debt     0 0
Long-term borrowings     4,494,000 13,331,000
Federal Home Loan Bank Certificates And Obligations F H L B Callable Advances        
Debt Instrument [Line Items]        
Long-term borrowings     0 10,000,000
Federal Home Loan Bank Certificates And Obligations F H L B Amortizing Advances        
Debt Instrument [Line Items]        
Long-term borrowings     4,400,000 3,400,000
Subordinated borrowings        
Debt Instrument [Line Items]        
Long-term borrowings     $ 98,038,000 $ 74,590,000
Junior subordinated borrowing | Trust I        
Debt Instrument [Line Items]        
Common stock of trust     100.00%  
Common stock of trust included in other asset     $ 500,000  
Sole asset of trust in form of debt     $ 15,500,000  
Variable interest rate     4.81% 2.01%
Period up to which interest payments can be deferred     5 years  
Junior subordinated borrowing | Trust II        
Debt Instrument [Line Items]        
Common stock of trust     100.00%  
Common stock of trust included in other asset     $ 200,000  
Sole asset of trust in form of debt     $ 8,200,000  
Variable interest rate     4.99% 1.90%
Period up to which interest payments can be deferred     5 years  
Junior subordinated borrowing | LIBOR | Trust I        
Debt Instrument [Line Items]        
Interest rate margin     1.85%  
Junior subordinated borrowing | LIBOR | Trust II        
Debt Instrument [Line Items]        
Interest rate margin     1.70%  
Federal Reserve Bank Advances        
Debt Instrument [Line Items]        
Line of credit facility, remaining borrowing capacity     $ 590,500,000 $ 511,000,000
Short-term debt     0 $ 0
Subordinated Debt | Subordinated borrowings        
Debt Instrument [Line Items]        
Maturity period 10 years 15 years    
Principal amount of debt issued $ 100,000,000 $ 75,000,000    
Fixed interest rate 5.50%      
Maturity period with fixed interest rate 5 years      
Non callable period 5 years      
Interest rate margin 2.49%      
Subordinated Debt | Subordinated borrowings | Debt Instrument Variable Rate Three Month SOFR        
Debt Instrument [Line Items]        
Unamortized debt issuance expense     $ 2,000,000