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Troubled Debt Restructuring (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Impaired Financing Receivable And Troubled Debt Restructing [Line Items]    
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing $ 184 $ 208
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 1,735 1,850
Impaired Financing Receivable, Trouble Debt Structuring, Total 1,919 2,058
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses 22 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 0 0
Impaired Financing Receivable, Trouble Debt Structuring, Total 0 15
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses 0 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 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 0 32
Impaired Financing Receivable, Trouble Debt Structuring, Total 0 32
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 184 193
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 0 0
Impaired Financing Receivable, Trouble Debt Structuring, Total 184 193
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses 22 31
Commercial Real Estate Other 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 1,735 1,818
Impaired Financing Receivable, Trouble Debt Structuring, Total 1,735 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 184 193
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual 1,735 1,818
Impaired Financing Receivable, Trouble Debt Structuring, Total 1,919 2,011
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses $ 22 $ 31