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Loans and Allowance for Loan Losses (Composition of Nonaccrual Loans by Portfolio Class) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans $ 262,649 $ 317,970
Total Commercial [Member] | Commercial Real Estate - Income Producing [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans 13,348 13,954
Total Commercial [Member] | Construction and Land Development [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans 3,561 4,550
Residential Mortgages [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans 23,012 23,665
Consumer [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans 13,424 12,351
Total Commercial & Industrial [Member] | Total Commercial [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans 209,304 263,450
Total Commercial & Industrial [Member] | Total Commercial [Member] | Commercial Non-Real Estate [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans 198,137 249,037
Total Commercial & Industrial [Member] | Total Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total loans $ 11,167 $ 14,413