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Loans and the Allowance for Loan Losses (Details) - Loans receivable on nonaccrual status - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status $ 14,055 $ 5,734
Commercial Portfolio Segment [Member]    
Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status 1,351 1,460
Commercial Real Estate Portfolio Segment [Member]    
Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status 8,571 1,081
Residential Real Estate Portfolio Segment [Member]    
Loans and the Allowance for Loan and Lease Losses (Details) - Loans receivable on nonaccrual status [Line Items]    
Financing Receivable, Recorded Investment, Nonaccrual Status $ 4,133 $ 3,193