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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, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | $ 11,607 | $ 15,299 | $ 10,224 | $ 15,257
Interest income recognized on an accrual basis | 62 | 64 | 126 | 131
Interest income recognized on a cash basis |  | 3 | 5 | 4
Commercial real estate- non owner-occupied [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 4,689 | 132 | 3,165 | 138
Interest income recognized on an accrual basis | 3 | 1 | 6 | 3
Commercial real estate- all other CRE [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 2,982 | 3,258 | 3,058 | 3,182
Interest income recognized on an accrual basis | 34 | 36 | 69 | 73
Acquisition and development- 1-4 family residential construction [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 255 | 282 | 259 | 285
Interest income recognized on an accrual basis | 3 | 3 | 6 | 6
Acquisition and development- All other A&D [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 611 | 8,515 | 599 | 8,436
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 |  | 16
Residential mortgage- term [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 2,585 | 2,450 | 2,672 | 2,477
Interest income recognized on an accrual basis | 19 | 21 | 39 | 43
Interest income recognized on a cash basis |  |  | 5 |
Residential mortgage- home equity [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | 474 | 634 | 454 | 709
Interest income recognized on a cash basis |  | 3 |  | 3
Consumer [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average Investment | $ 11 | $ 19 | $ 17 | $ 14

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