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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 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | $ 2,792 | $ 2,634
Impaired Loans with Specific Allowance: Related Allowance | 821 | 362
Impaired Loans with No Specific Allowance: Recorded Investment | 9,252 | 12,317
Total Impaired Loans: Recorded Investment | 12,044 | 14,951
Total Impaired Loans: Unpaid Principal Balance | 21,713 | 24,983
Commercial real estate- non owner-occupied [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 1,648 | 1,711
Impaired Loans with Specific Allowance: Related Allowance | 633 | 245
Impaired Loans with No Specific Allowance: Recorded Investment | 54 | 1,907
Total Impaired Loans: Recorded Investment | 1,702 | 3,618
Total Impaired Loans: Unpaid Principal Balance | 8,663 | 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 | 4,826 | 5,458
Total Impaired Loans: Recorded Investment | 4,826 | 5,458
Total Impaired Loans: Unpaid Principal Balance | 4,826 | 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 | 527 | 527
Total Impaired Loans: Recorded Investment | 527 | 527
Total Impaired Loans: Unpaid Principal Balance | 527 | 527
Acquisition and development- All other A&D [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 236 | 295
Impaired Loans with Specific Allowance: Related Allowance | 30 | 40
Impaired Loans with No Specific Allowance: Recorded Investment | 167 | 154
Total Impaired Loans: Recorded Investment | 403 | 449
Total Impaired Loans: Unpaid Principal Balance | 571 | 722
Commercial and industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 10 | 0
Impaired Loans with Specific Allowance: Related Allowance | 10 | 0
Impaired Loans with No Specific Allowance: Recorded Investment | 307 | 668
Total Impaired Loans: Recorded Investment | 317 | 668
Total Impaired Loans: Unpaid Principal Balance | 2,531 | 2,882
Residential mortgage- term [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 788 | 598
Impaired Loans with Specific Allowance: Related Allowance | 104 | 65
Impaired Loans with No Specific Allowance: Recorded Investment | 2,782 | 3,023
Total Impaired Loans: Recorded Investment | 3,570 | 3,621
Total Impaired Loans: Unpaid Principal Balance | 3,883 | 3,919
Residential mortgage- home equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 85 | 0
Impaired Loans with Specific Allowance: Related Allowance | 37 | 0
Impaired Loans with No Specific Allowance: Recorded Investment | 589 | 580
Total Impaired Loans: Recorded Investment | 674 | 580
Total Impaired Loans: Unpaid Principal Balance | 687 | 593
Consumer [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Specific Allowance: Recorded Investment | 25 | 30
Impaired Loans with Specific Allowance: Related Allowance | 7 | 12
Impaired Loans with No Specific Allowance: Recorded Investment | 0 | 0
Total Impaired Loans: Recorded Investment | 25 | 30
Total Impaired Loans: Unpaid Principal Balance | $ 25 | $ 30

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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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