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Impaired Loans (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance $ 157 $ 3,630
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied 0 (1,094)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 157 2,536
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance 0 227
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied 0 (21)
Impaired Financing Receivable, with Related Allowance, Recorded Investment 0 206
Impaired Financing Receivable, With Related Allowance, Related Allowance 0 42
Impaired Financing Receivable, Unpaid Principal Balance 157 3,857
Impaired Financing Receivable, Charge-off And Payments Applied 0 (1,115)
Impaired Financing Receivable, Recorded Investment 157 2,742
Impaired Financing Receivable, Related Allowance 0 42
Commercial and Industrial Loans [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance   0
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied   0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment   0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance 0  
Impaired Financing Receivable, with Related Allowance, Recorded Investment 0  
Impaired Financing Receivable, With Related Allowance, Related Allowance 0  
Construction And Land Development Loans [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance   0
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied   0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment   0
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied 0  
Commercial Real Estate Owner Occupied Loans [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance 0 175
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied 0 0
Impaired Financing Receivable, with Related Allowance, Recorded Investment 0 175
Impaired Financing Receivable, With Related Allowance, Related Allowance 0 11
Commercial Real Estate Other Loans [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 0 3,630
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied 0 (1,094)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 0 2,536
Commercial Real Estate Loans, Total [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance 157 3,630
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied 0 (1,094)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 157 2,536
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance 0 175
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied 0 0
Impaired Financing Receivable, with Related Allowance, Recorded Investment 0 175
Impaired Financing Receivable, With Related Allowance, Related Allowance $ 0 $ 11