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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 | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | $ 15,299 | $ 17,053 | $ 15,257 | $ 14,892
Interest income recognized on an accrual basis | 64 | 73 | 131 | 150
Interest income recognized on a cash basis | 3 | 4 | 4 | 12
Commercial real estate- non owner-occupied [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 132 | 258 | 138 | 270
Interest income recognized on an accrual basis | 1 | 3 | 3 | 6
Commercial real estate- all other CRE [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 3,258 | 4,807 | 3,182 | 4,853
Interest income recognized on an accrual basis | 36 | 38 | 73 | 76
Acquisition and development- 1-4 family residential construction [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 282 | 307 | 285 | 310
Interest income recognized on an accrual basis | 3 | 4 | 6 | 9
Acquisition and development- All other A&D [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 8,515 | 7,772 | 8,436 | 5,306
Interest income recognized on an accrual basis | 3 | 3 | 6 | 6
Interest income recognized on a cash basis |  |  | 1 |
Commercial and industrial [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 9 | 27 | 16 | 24
Residential mortgage- term [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 2,450 | 2,941 | 2,477 | 3,261
Interest income recognized on an accrual basis | 21 | 25 | 43 | 53
Interest income recognized on a cash basis |  | 2 |  | 10
Residential mortgage- home equity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 634 | 925 | 709 | 854
Interest income recognized on a cash basis | 3 | 2 | 3 | 2
Consumer [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | $ 19 | $ 16 | $ 14 | $ 14

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