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Loans (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans $ 4,411,057,000 $ 4,005,036,000  
Accrued interest receivable 24,481,000 19,371,000  
Loans, related parties 40,000,000 37,800,000  
Loans, related parties, new borrowings 10,700,000    
Loans, related parties, repayments and other reductions 8,500,000    
Interest income on nonaccrual loans 0 0 $ 0
Estimated interest income $ 589,000 391,000 $ 211,000
Days past due when loans are generally placed on nonaccrual status, in days 90 days    
Consumer Overdrafts [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Past due greater than 90 days and still accruing interest $ 21,000 1,000  
Other Assets [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accrued interest receivable $ 21,800,000 $ 16,600,000