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Loans And Related Allowances For Loan Losses (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($) loan contract | Dec. 31, 2017 USD ($) loan
Financing Receivable, Modifications [Line Items] |  |
Commercial amount benchmark minimum for internal annual review | $ 500,000 |
Commercial amount benchmark minimum for annual review by independent reviewer | 1,000,000 |
Non consumer loan amount benchmark minimum for annual review by independent reviewer | 500,000 |
Commercial relationship amount benchmark for evaluation | 750,000 |
Maximum commercial loan benchmark for external appraisal | $ 500,000 |
Past appraisal period benchmark for external appraisal | 18 months |
Threshold limit for commercial loan appraisal by internal discounted appraisal grid | $ 500,000 |
Nonaccrual loans subject to partial charge off | $ 4,922,000 | $ 7,118,000
Financing receivable, modifications, number of contracts | loan | 16 | 19
Financing receivable, modifications, recorded investment | $ 4,900,000 | $ 6,000,000
Transfers from loans to OREO | 534,000 | 2,060,000
Partial Charge Off [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | $ 300,000 | 2,100,000
New TDR [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Financing receivable, modifications, number of contracts | contract | 0 |
Troubled Debt Restructuring [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Unused commitments to extend credit | $ 0 | 0
Foreclosure 1-4 Family Real Estate Properties [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Loans secured by real estate properties in process of foreclosure | 300,000 | 400,000
Commercial real estate- non owner-occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | 173,000 | 3,248,000
Commercial real estate- all other CRE [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | 1,968,000 | 1,205,000
Acquisition and development- 1-4 family residential construction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | 0 | 0
Acquisition and development- All other A&D [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | 147,000 | 211,000
Commercial and industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | 0 | 378,000
Residential mortgage- term [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | 1,911,000 | 1,466,000
Residential mortgage- home equity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | 713,000 | 580,000
Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccrual loans subject to partial charge off | $ 10,000 | $ 30,000

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