Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Narrative) (Details)

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LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Narrative) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
segment
loan
Sep. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Loans under modified terms $ 1,019,000   $ 29,419,000          
Troubled Debt Restructurings (TDRs)           $ 14,190,000    
Total Allowance for credit losses 125,627,000 $ 108,009,000 125,627,000 $ 108,009,000 $ 120,683,000 110,768,000 $ 104,184,000 $ 99,787,000
Interest income recognized on nonaccrual loans 0 0 $ 0 0        
Number of loans designated as TLMs currently past due | loan     0          
Number of operating segments | segment     2          
Commercial Portfolio                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total Allowance for credit losses 98,940,000 $ 83,901,000 $ 98,940,000 $ 83,901,000 $ 92,970,000 82,753,000 $ 77,413,000 $ 77,902,000
Number of loans with associated charge-offs | loan     2          
Troubled Debt Restructurings [Member]                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Troubled Debt Restructurings (TDRs)           14,200,000    
Total Allowance for credit losses           $ 739,000    
Troubled Loan Modifications                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Loans under modified terms     $ 29,400,000          
Total Allowance for credit losses 155,000   155,000          
Unfunded commitments on TLM loans $ 1,500,000   $ 1,500,000