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Loans And Related Allowances For Credit Losses (Narrative) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
loan
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Jan. 01, 2023
USD ($)
Dec. 31, 2021
USD ($)
Financing Receivable, Modifications [Line Items]          
Allowance for loan losses $ 16,871 $ 15,292 $ 14,636 $ 16,702 $ 15,955
Nonaccrual loans 3,258   3,495    
Threshold commitment amount $ 100        
Number of loan modifications made to borrowers facing financial difficulties | loan 0        
Partial Charge Off [Member]          
Financing Receivable, Modifications [Line Items]          
Nonaccrual loans $ 200   100    
Troubled Debt Restructuring [Member]          
Financing Receivable, Modifications [Line Items]          
Allowance for loan losses     400    
Commercial real estate- non owner-occupied [Member]          
Financing Receivable, Modifications [Line Items]          
Nonaccrual loans 85   87    
Commercial real estate- all other CRE [Member]          
Financing Receivable, Modifications [Line Items]          
Nonaccrual loans     58    
Acquisition and development- 1-4 family residential construction [Member]          
Financing Receivable, Modifications [Line Items]          
Financing receivable excluding accrued interest subject to foreclosure $ 2,000   $ 0    
Percentage Of Loan Portfolio Accruing Loan Past Due Thirty Days Or More 0.17% 0.19% 0.16%    
Acquisition and development- All other A&D [Member]          
Financing Receivable, Modifications [Line Items]          
Nonaccrual loans $ 135   $ 146    
Commercial and industrial [Member]          
Financing Receivable, Modifications [Line Items]          
Allowance for loan losses 3,755 $ 2,513 2,845 4,179 2,460
Residential mortgage- term [Member]          
Financing Receivable, Modifications [Line Items]          
Nonaccrual loans 2,678   2,893    
Residential mortgage- home equity [Member]          
Financing Receivable, Modifications [Line Items]          
Nonaccrual loans 338   311    
Consumer [Member]          
Financing Receivable, Modifications [Line Items]          
Allowance for loan losses 827 $ 940 $ 877 $ 1,085 $ 934
Nonaccrual loans $ 22