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Troubled Debt Restructurings (Narrative) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
contract
Dec. 31, 2014
USD ($)
contract
Dec. 31, 2013
contract
Financing Receivable, Modifications [Line Items]      
Number of troubled debt restructured loans 23 25  
Total troubled debt restructured loans | $ $ 7,500 $ 7,800  
Number of contracts in nonaccrual status 2 8  
Total of loans in nonaccrual status | $ $ 526 $ 1,400  
Number of contracts 3 5 5
Loan is considered payment default 30 days    
Residential Single Family [Member]      
Financing Receivable, Modifications [Line Items]      
Number of contracts modified by changing the amortization period 2    
Number of contracts modified by reducing the payment amount   1  
Number of contracts modified by changing the amortization period and lowering the interest rate 1   1
Number of contracts modified by forgiving a portion of the loan     1
Commercial - Non Real Estate Commercial And Industrial [Member]      
Financing Receivable, Modifications [Line Items]      
Number of contracts   2  
Number of contracts modified by reducing the payment amount   2  
Construction And Farmland Commercial [Member]      
Financing Receivable, Modifications [Line Items]      
Number of contracts   1 2
Number of contracts modified by extending the term loan and interest payments only     1
Number of contracts modified by granting a lower interest rate     1
Number of contracts modified by forgiving a portion of the loan   1  
Residential Equity Lines [Member]      
Financing Receivable, Modifications [Line Items]      
Number of contracts   1 1
Number of contracts modified by changing payments to interest only   1 1