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Loans And Related Allowances For Loan Losses (Narrative) (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
contract
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
contract
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Financing Receivable, Modifications [Line Items]                
Allowance for loan losses $ 15,737,000 $ 15,292,000 $ 17,068,000 $ 15,737,000 $ 17,068,000 $ 15,955,000 $ 16,554,000 $ 16,486,000
Nonaccrual loans 2,149,000     2,149,000   2,462,000    
Financing receivable, modifications, subsequent default, recorded investment 0   0 0 0      
Substandard [Member]                
Financing Receivable, Modifications [Line Items]                
Increase (decrease) in loans and leases receivable net of deferred income   $ 6,300,000            
Partial Charge Off [Member]                
Financing Receivable, Modifications [Line Items]                
Nonaccrual loans 1,300,000     1,300,000   500,000    
Troubled Debt Restructuring [Member]                
Financing Receivable, Modifications [Line Items]                
Allowance for loan losses 300,000     $ 300,000   $ 400,000    
Financing receivable, modifications, number of contracts | contract       12   12    
Financing receivable, modifications, recorded investment 3,200,000     $ 3,200,000   $ 3,300,000    
Commercial real estate- all other CRE [Member]                
Financing Receivable, Modifications [Line Items]                
Nonaccrual loans 66,000     66,000   81,000    
Acquisition and development- 1-4 family residential construction [Member]                
Financing Receivable, Modifications [Line Items]                
Loans in process of foreclosure $ 100,000     100,000   $ 200,000    
Percentage of loan portfolio accruing loans excluding PPP loans past due 30 days or more 0.37%              
Percentage Of Loan Portfolio Accruing Loan Past Due Thirty Days Or More   0.19%       0.31%    
Acquisition and development- All other A&D [Member]                
Financing Receivable, Modifications [Line Items]                
Nonaccrual loans $ 375,000     375,000   $ 390,000    
Commercial and industrial [Member]                
Financing Receivable, Modifications [Line Items]                
Allowance for loan losses 2,830,000 $ 2,513,000 2,944,000 2,830,000 2,944,000 2,460,000 2,831,000 2,584,000
Nonaccrual loans           90,000    
Commercial and industrial [Member] | CARES Act [Member]                
Financing Receivable, Modifications [Line Items]                
PPP loans 800,000     $ 800,000   $ 7,700,000    
PPP loans SBA guarantee percent       100.00%   100.00%    
Allowance for loan losses 0     $ 0   $ 0    
Residential mortgage- term [Member]                
Financing Receivable, Modifications [Line Items]                
Nonaccrual loans 1,340,000     1,340,000   1,498,000    
Residential mortgage- home equity [Member]                
Financing Receivable, Modifications [Line Items]                
Nonaccrual loans 335,000     335,000   403,000    
Consumer [Member]                
Financing Receivable, Modifications [Line Items]                
Allowance for loan losses 973,000 $ 940,000 $ 590,000 973,000 $ 590,000 $ 934,000 $ 368,000 $ 370,000
Nonaccrual loans $ 33,000     $ 33,000