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COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS (Details) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS        
Contract amount of commitments and contingencies   $ 1,544,138,000 $ 1,486,563,000  
Federal Reserve unused borrowing capacity   490,500,000    
Federal Reserve required average total reserve   0 0  
Litigation accrual   0 (100,000) $ 2,950,000
Litigation settlement amount $ 2,900,000      
Adjustment to the Company's litigation accrual   100,000    
Minimum        
COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS        
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability   0    
Maximum        
COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS        
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability   1,000,000    
Commitments to extend credit        
COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS        
Contract amount of commitments and contingencies   1,486,791,000 1,443,879,000  
Standby letters of credit        
COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS        
Contract amount of commitments and contingencies   $ 57,347,000 $ 42,684,000