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Loans (Impaired Loans by Loan Classification) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Financing Receivable, Impaired [Line Items]    
Recorded Investment, with a valuation allowance
Unpaid Principal Balance, with a valuation allowance
Associated Allowance, with a valuation allowance
Average Recorded Investment, with a valuation allowance
Interest Income Recognized, with a valuation allowance
Recorded Investment, total $ 1,619 $ 1,697
Unpaid Principal Balance, total $ 1,688 $ 1,757
Associated Allowance, total
Average Recorded Investment, total $ 1,833 $ 1,736
Interest Income Recognized, total $ 70 80
Commercial and industrial - organic [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, without a valuation allowance  
Unpaid Principal Balance, without a valuation allowance  
Associated Allowance, without a valuation allowance  
Average Recorded Investment, without a valuation allowance $ 4  
Interest Income Recognized, without a valuation allowance  
Other construction and land [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, without a valuation allowance $ 59 69
Unpaid Principal Balance, without a valuation allowance $ 103 $ 109
Associated Allowance, without a valuation allowance
Average Recorded Investment, without a valuation allowance $ 64 $ 79
Interest Income Recognized, without a valuation allowance   1
1-4 family residential mortgages [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, without a valuation allowance 499 525
Unpaid Principal Balance, without a valuation allowance $ 524 $ 545
Associated Allowance, without a valuation allowance
Average Recorded Investment, without a valuation allowance $ 685 $ 437
Interest Income Recognized, without a valuation allowance 23 16
Home equity lines of credit [Member]    
Financing Receivable, Impaired [Line Items]    
Average Recorded Investment, without a valuation allowance   50
Interest Income Recognized, without a valuation allowance   3
Commercial owner occupied real estate [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, without a valuation allowance   1,103
Unpaid Principal Balance, without a valuation allowance   $ 1,103
Associated Allowance, without a valuation allowance  
Average Recorded Investment, without a valuation allowance   $ 1,124
Interest Income Recognized, without a valuation allowance   $ 60
Commercial non-owner occupied real estate [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment, without a valuation allowance 1,061
Unpaid Principal Balance, without a valuation allowance $ 1,061
Associated Allowance, without a valuation allowance
Average Recorded Investment, without a valuation allowance $ 1,080 $ 46
Interest Income Recognized, without a valuation allowance $ 47