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Loans And The Allowance For Credit Losses (Amortized Costs, At The Class Level, For Nonaccrual Loans) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Financing Receivable, Impaired [Line Items]        
Amortized Cost With Allowance $ 1,431 $ 456    
Amortized Cost Without Allowance 25,924 26,361    
Non-accruing Loans 27,355 26,817 $ 22,339 $ 17,394
Interest Income Recognized 273 215    
Commercial And Industrial [Member]        
Financing Receivable, Impaired [Line Items]        
Amortized Cost With Allowance   2    
Amortized Cost Without Allowance 1,876 4,478    
Non-accruing Loans 1,876 4,480 2,625 4,919
Interest Income Recognized 13 6    
Residential Mortgages [Member] | Mortgages [Member]        
Financing Receivable, Impaired [Line Items]        
Amortized Cost With Allowance 163 246    
Amortized Cost Without Allowance 4,137 3,452    
Non-accruing Loans 4,300 3,698 3,738 3,020
Interest Income Recognized 34 12    
Commercial Real Estate Mortgages [Member] | Construction [Member]        
Financing Receivable, Impaired [Line Items]        
Amortized Cost With Allowance 1,268      
Amortized Cost Without Allowance 6,913 8,927    
Non-accruing Loans 8,181 8,927 8,765 2,942
Home Equities [Member]        
Financing Receivable, Impaired [Line Items]        
Amortized Cost With Allowance   37    
Amortized Cost Without Allowance 385 478    
Non-accruing Loans 385 515 563 755
Interest Income Recognized 7 14    
Total Real Estate Loans [Member] | Residential Mortgages [Member] | Mortgages [Member]        
Financing Receivable, Impaired [Line Items]        
Non-accruing Loans 4,300   3,738  
Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member]        
Financing Receivable, Impaired [Line Items]        
Amortized Cost With Allowance   171    
Amortized Cost Without Allowance 12,613 9,026    
Non-accruing Loans 12,613 9,197 6,648 $ 5,758
Interest Income Recognized 219 $ 183    
Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | Mortgages [Member]        
Financing Receivable, Impaired [Line Items]        
Non-accruing Loans 12,613   6,648  
Total Real Estate Loans [Member] | Commercial Real Estate Mortgages [Member] | Construction [Member]        
Financing Receivable, Impaired [Line Items]        
Non-accruing Loans 8,181   8,765  
Total Real Estate Loans [Member] | Home Equities [Member]        
Financing Receivable, Impaired [Line Items]        
Non-accruing Loans $ 385   $ 563