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Credit Quality and Nonperforming Assets (Narrative) (Details) - USD ($)
 6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Credit Quality And Non Performing Assets [Line Items]    
Financing Receivable, Modifications, Recorded Investment $ 17,200,000  
Financing Receivable Average Investment Nonaccrual Loans 2,500,000  
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Accretion 70,000  
Purchase Credit Impaired Loans Allowance For Loan Losses $ 117,000 $ 121,000