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Loans And Related Allowances For Loan Losses (Narrative) (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
contract
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
contract
Dec. 31, 2020
USD ($)
Financing Receivable, Modifications [Line Items]        
Allowance for loan losses $ 15,292,000 $ 16,554,000 $ 15,955,000 $ 16,486,000
Nonaccrual loans 2,332,000   2,462,000  
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 $ 600,000   500,000  
New TDRs [Member]        
Financing Receivable, Modifications [Line Items]        
Financing receivable, modifications, number of contracts 0 0    
Financing receivable, modifications, recorded investment $ 0 $ 0    
Troubled Debt Restructuring [Member]        
Financing Receivable, Modifications [Line Items]        
Allowance for loan losses $ 100,000   $ 400,000  
Financing receivable, modifications, number of contracts | contract 12   12  
Financing receivable, modifications, recorded investment $ 3,200,000   $ 3,300,000  
Commercial real estate- all other CRE [Member]        
Financing Receivable, Modifications [Line Items]        
Nonaccrual loans 73,000   81,000  
Acquisition and development- 1-4 family residential construction [Member]        
Financing Receivable, Modifications [Line Items]        
Loans in process of foreclosure $ 200,000   $ 200,000  
Percentage of loan portfolio accruing loans including PPP loans past due 30 days or more 0.19%   0.31%  
Acquisition and development- All other A&D [Member]        
Financing Receivable, Modifications [Line Items]        
Nonaccrual loans $ 381,000   $ 390,000  
Commercial and industrial [Member]        
Financing Receivable, Modifications [Line Items]        
PPP loans     7,700,000  
Allowance for loan losses 2,513,000 2,831,000 2,460,000 2,584,000
Nonaccrual loans     90,000  
Commercial and industrial [Member] | CARES Act [Member]        
Financing Receivable, Modifications [Line Items]        
PPP loans $ 1,300,000   $ 7,700,000  
PPP loans SBA guarantee percent 100.00%   100.00%  
Allowance for loan losses $ 0   $ 0  
Residential mortgage- term [Member]        
Financing Receivable, Modifications [Line Items]        
Nonaccrual loans 1,487,000   1,498,000  
Residential mortgage- home equity [Member]        
Financing Receivable, Modifications [Line Items]        
Nonaccrual loans 391,000   403,000  
Consumer [Member]        
Financing Receivable, Modifications [Line Items]        
Allowance for loan losses $ 940,000 $ 368,000 $ 934,000 $ 370,000