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Loans and Allowance for Loan and Lease Losses (Narrative) (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
USD ($)
loan
Sep. 30, 2014
USD ($)
loan
Sep. 30, 2015
USD ($)
loan
Sep. 30, 2014
USD ($)
loan
Dec. 31, 2014
USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 6,311,000   $ 6,311,000   $ 8,746,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down     $ 0 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loan 0 0 2 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 3,404,000    
Foreclosure proceedings in process $ 0   0   485,000
Three Unrelated Borrowers [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down         2,035,000
Nonaccruing [Member] | Two Large Relationships [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment         4,680,000
Nonaccruing [Member] | 11 Loans with 6 Relationships [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment 5,828,000   5,828,000    
Nonaccruing [Member] | 2 Large Relationship [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment 4,535,000   4,535,000    
Nonaccruing [Member] | 14 Loans with 9 Relationships [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment         6,711,000
Accruing [Member] | 2 Relationship [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment         1,964,000
Accruing [Member] | Three Unrelated Borrowers [Member] | Residential Mortgage [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down         $ 71,000
Accruing [Member] | Four Borrowers [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 483,000   $ 483,000    
Commercial and industrial [Member] | Industrial Property [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Loan Terms     1 year    
Loan To Value Ratio 80.00%   80.00%    
Impaired Financing Receivable, Interest Income, Cash Basis Method $ 100,000 $ 205,000    
Commercial real estate [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Impaired Financing Receivable, Interest Income, Cash Basis Method 14,000 361,000 $ 346,000  
Commercial real estate [Member] | Accruing [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 417,000   $ 417,000    
Residential Portfolio [Member] | Residential Mortgage [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Loan Terms     30 years    
Loan To Value Ratio 100.00%   100.00%    
Loan To Value Ratio, Exposure After Private Mortgage Insurance     85.00%    
Impaired Financing Receivable, Interest Income, Cash Basis Method $ 8,000 $ 8,000    
Residential Portfolio [Member] | Accruing [Member] | Residential Mortgage [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 66,000   $ 66,000    
Consumer [Member] | Home Equity Loan [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Loan Terms     5 years    
Loan To Value Ratio 85.00%   85.00%    
Impaired Financing Receivable, Interest Income, Cash Basis Method $ 3,000 $ 3,000    
Consumer [Member] | Maximum [Member] | Home Equity Loan [Member]          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Loan Terms     20 years