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Loans and Related Allowance for Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | $ 1,594 | $ 2,634
Impaired Loans with Specific Allowance: Related Allowance | 175 | 362
Impaired Loans with No Specific Allowance: Recorded Investment | 10,945 | 12,317
Total Impaired Loans: Recorded Investment | 12,539 | 14,951
Total Impaired Loans: Unpaid Principal Balance | 22,927 | 24,983
Commercial real estate- non owner-occupied [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 124 | 1,711
Impaired Loans with Specific Allowance: Related Allowance | 16 | 245
Impaired Loans with No Specific Allowance: Recorded Investment | 689 | 1,907
Total Impaired Loans: Recorded Investment | 813 | 3,618
Total Impaired Loans: Unpaid Principal Balance | 8,598 | 10,579
Commercial real estate- all other CRE [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 0 | 0
Impaired Loans with Specific Allowance: Related Allowance | 0 | 0
Impaired Loans with No Specific Allowance: Recorded Investment | 6,625 | 5,458
Total Impaired Loans: Recorded Investment | 6,625 | 5,458
Total Impaired Loans: Unpaid Principal Balance | 6,625 | 5,731
Acquisition and development- 1-4 family residential construction [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 0 | 0
Impaired Loans with Specific Allowance: Related Allowance | 0 | 0
Impaired Loans with No Specific Allowance: Recorded Investment | 457 | 527
Total Impaired Loans: Recorded Investment | 457 | 527
Total Impaired Loans: Unpaid Principal Balance | 457 | 527
Acquisition and development- All other A&D [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 234 | 295
Impaired Loans with Specific Allowance: Related Allowance | 28 | 40
Impaired Loans with No Specific Allowance: Recorded Investment | 42 | 154
Total Impaired Loans: Recorded Investment | 276 | 449
Total Impaired Loans: Unpaid Principal Balance | 367 | 722
Commercial and industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 0 | 0
Impaired Loans with Specific Allowance: Related Allowance | 0 | 0
Impaired Loans with No Specific Allowance: Recorded Investment | 305 | 668
Total Impaired Loans: Recorded Investment | 305 | 668
Total Impaired Loans: Unpaid Principal Balance | 2,519 | 2,882
Residential mortgage- term [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 1,213 | 598
Impaired Loans with Specific Allowance: Related Allowance | 125 | 65
Impaired Loans with No Specific Allowance: Recorded Investment | 2,274 | 3,023
Total Impaired Loans: Recorded Investment | 3,487 | 3,621
Total Impaired Loans: Unpaid Principal Balance | 3,772 | 3,919
Residential mortgage- home equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 0 | 0
Impaired Loans with Specific Allowance: Related Allowance | 0 | 0
Impaired Loans with No Specific Allowance: Recorded Investment | 553 | 580
Total Impaired Loans: Recorded Investment | 553 | 580
Total Impaired Loans: Unpaid Principal Balance | 566 | 593
Consumer [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 23 | 30
Impaired Loans with Specific Allowance: Related Allowance | 6 | 12
Impaired Loans with No Specific Allowance: Recorded Investment | 0 | 0
Total Impaired Loans: Recorded Investment | 23 | 30
Total Impaired Loans: Unpaid Principal Balance | $ 23 | $ 30

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition 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 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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