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Loans and Allowance for Credit Losses (Troubled Debt Restructurings With Subsequent Default) (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2016
USD ($)
contract
Sep. 30, 2015
USD ($)
contract
Financing Receivable, Allowance for Credit Losses [Line Items]    
Number of contracts | contract 3 2
Recorded investment | $ $ 616 $ 279
Commercial Real Estate Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Number of contracts | contract 2 2
Recorded investment | $ $ 375 $ 279
Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member]    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Number of contracts | contract 1  
Recorded investment | $ $ 241