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Nature of Operations and Summary of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
Location
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
Accounting Policies [Abstract]      
Number of location of banking operations | Location 31    
Period for federal fund sold 1 day    
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Unpaid principal balance of mortgages serviced for others $ 231,143 $ 248,756  
Capitalized mortgage loans on real estate carrying amount 2,185 2,422  
Corporation recorded servicing fee revenue 588 630 $ 669
Other Real Estate, Foreclosed Assets, and Repossessed Assets 544 406  
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Present value of the post retirement benefits payable 2,687 2,515  
Periodic policy maintenance costs $ 172 $ 173 $ 61
Director [Member]      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Eligible shares, unissued | shares 101,493 154,119  
Common stock, shares held in Rabbi Trust | shares 142,535 150,581  
Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Useful lives of the related assets 3 years    
Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Useful lives of the related assets 40 years    
Debt Securities [Member]      
Condensed Balance Sheet Statements, Captions [Line Items]      
Interest Receivable $ 1,701 $ 2,247  
Loans      
Condensed Balance Sheet Statements, Captions [Line Items]      
Interest Receivable $ 6,384 $ 5,920