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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, 2016 | Dec. 31, 2015
Financing Receivable, Impaired [Line Items] |  |
Average Investment | $ 27,028 | $ 24,214
Interest income recognized on an accrual basis | 640 | 653
Interest income recognized on a cash basis | 24 | 136
Commercial real estate- non owner-occupied [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 6,076 | 3,792
Interest income recognized on an accrual basis | 131 | 144
Interest income recognized on a cash basis | 0 | 0
Commercial real estate- all other CRE [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 11,802 | 8,688
Interest income recognized on an accrual basis | 187 | 124
Interest income recognized on a cash basis | 8 | 106
Acquisition and development- 1-4 family residential construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 629 | 736
Interest income recognized on an accrual basis | 27 | 33
Interest income recognized on a cash basis | 0 | 0
Acquisition and development- All other A&D [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 2,735 | 5,008
Interest income recognized on an accrual basis | 95 | 119
Interest income recognized on a cash basis | 0 | 0
Commercial and industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 934 | 1,392
Interest income recognized on an accrual basis | 37 | 69
Interest income recognized on a cash basis | 0 | 18
Residential mortgage- term [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 4,580 | 4,258
Interest income recognized on an accrual basis | 163 | 164
Interest income recognized on a cash basis | 16 | 10
Residential mortgage- home equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 272 | 334
Interest income recognized on an accrual basis | 0 | 0
Interest income recognized on a cash basis | 0 | 2
Consumer [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Investment | 0 | 6
Interest income recognized on an accrual basis | 0 | 0
Interest income recognized on a cash basis | $ 0 | $ 0

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5258-111524 + Details
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