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Troubled Debt Restructuring (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | $ 170 | $ 462
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 2,191 | 1,462
Impaired Financing Receivable, Trouble Debt Structuring, Total | 2,361 | 1,924
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 36 | 42
Commercial and Industrial Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 30 | 31
Impaired Financing Receivable, Trouble Debt Structuring, Total | 30 | 31
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 30 | 31
Construction And Land Development Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 0 | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 | 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 | 170 | 175
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 | 0
Impaired Financing Receivable, Trouble Debt Structuring, Total | 170 | 175
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 6 | 11
Commercial Real Estate Other Loans [Member] |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 | 287
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 2,161 | 1,431
Impaired Financing Receivable, Trouble Debt Structuring, Total | 2,161 | 1,718
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 | 170 | 462
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 2,161 | 1,431
Impaired Financing Receivable, Trouble Debt Structuring, Total | 2,331 | 1,893
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | $ 6 | $ 11

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