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Troubled Debt Restructuring (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | $ 462 | $ 208
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 1,462 | 1,850
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,924 | 2,058
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 42 | 31
Commercial and Industrial Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 | 15
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 31 | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 31 | 15
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 31 | 0
Construction And Land Development Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing |  | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual |  | 32
Impaired Financing Receivable, Trouble Debt Structuring, Total |  | 32
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses |  | 0
Commercial Real Estate Owner Occupied Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 175 | 193
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 175 | 193
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 11 | 31
Commercial Real Estate Other Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 287 | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 1,431 | 1,818
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,718 | 1,818
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 | 0
Commercial Real Estate Loans, Total [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 462 | 193
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 1,431 | 1,818
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,893 | 2,011
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | $ 11 | $ 31

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