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Loans And Related Allowances For Loan Losses (Average of Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Financing Receivable, Impaired [Line Items] |  |
Average Investment | $ 15,170 | $ 12,145
Interest income recognized on an accrual basis | 287 | 380
Interest income recognized on a cash basis | 87 | 134
Commercial real estate- non owner-occupied [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 222 | 1,432
Interest income recognized on an accrual basis | 12 | 12
Interest income recognized on a cash basis |  | 66
Commercial real estate- all other CRE [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 4,322 | 5,385
Interest income recognized on an accrual basis | 149 | 195
Interest income recognized on a cash basis | 73 | 59
Acquisition and development- 1-4 family residential construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 244 | 443
Interest income recognized on an accrual basis | 11 | 24
Acquisition and development- All other A&D [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 6,505 | 355
Interest income recognized on an accrual basis | 19 | 12
Commercial and industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 26 | 265
Interest income recognized on an accrual basis |  | 13
Residential mortgage- term [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 2,971 | 3,632
Interest income recognized on an accrual basis | 96 | 124
Interest income recognized on a cash basis | 10 | 2
Residential mortgage- home equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 870 | 611
Interest income recognized on a cash basis | 4 | 7
Consumer [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | $ 10 | $ 22

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