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Loans And Related Allowances For Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment $ 9,139 $ 9,200
Impaired Loans with Specific Allowance: Related Allowance 2,233 2,173
Impaired Loans with No Specific Allowance: Recorded Investment 6,135 5,974
Total Impaired Loans: Recorded Investment 15,274 15,174
Unpaid Principal Balance 25,778 25,865
Commercial real estate- non owner-occupied [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 115 116
Impaired Loans with Specific Allowance: Related Allowance 7 9
Impaired Loans with No Specific Allowance: Recorded Investment 18 33
Total Impaired Loans: Recorded Investment 133 149
Unpaid Principal Balance 8,142 8,224
Commercial real estate- all other CRE [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Specific Allowance: Recorded Investment 3,218 3,030
Total Impaired Loans: Recorded Investment 3,218 3,030
Unpaid Principal Balance 3,218 3,030
Acquisition and development- 1-4 family residential construction [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Specific Allowance: Recorded Investment 285 291
Total Impaired Loans: Recorded Investment 285 291
Unpaid Principal Balance 285 291
All Other Acquisition And Development [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 8,287 8,219
Impaired Loans with Specific Allowance: Related Allowance 2,211 2,142
Impaired Loans with No Specific Allowance: Recorded Investment 89 60
Total Impaired Loans: Recorded Investment 8,376 8,279
Unpaid Principal Balance 8,449 8,340
Commercial and industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Specific Allowance: Recorded Investment   30
Total Impaired Loans: Recorded Investment   30
Unpaid Principal Balance 2,213 2,266
Residential mortgage- term [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Specific Allowance: Recorded Investment 737 865
Impaired Loans with Specific Allowance: Related Allowance 15 22
Impaired Loans with No Specific Allowance: Recorded Investment 1,724 1,668
Total Impaired Loans: Recorded Investment 2,461 2,533
Unpaid Principal Balance 2,644 2,724
Residential mortgage- home equity [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Specific Allowance: Recorded Investment 798 858
Total Impaired Loans: Recorded Investment 798 858
Unpaid Principal Balance 811 986
Consumer [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with No Specific Allowance: Recorded Investment 3 4
Total Impaired Loans: Recorded Investment 3 4
Unpaid Principal Balance $ 16 $ 4