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Loans (Narrative) (Details) - USD ($)
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans held for sale $ 2,495,000   $ 1,370,000
Residential Real Estate Mortgages Serviced For Others 276,800,000   269,400,000
Accrued interest receivable 23,702,000   24,481,000
Interest income on nonaccrual loans 0 $ 0  
Estimated interest income 519,000 $ 437,000  
Other Assets [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accrued interest receivable 20,800,000   20,800,000
Residential Real Estate Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans held for sale 2,500,000   1,400,000
Consumer Overdrafts [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Past due greater than 90 days and still accruing interest $ 35,000   $ 21,000