Loans And Allowance For Loan Losses (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans to individuals and businesses $ 413,800,000    
Percentage of loans to individuals and businesses 30.00%    
Loans held for sale 1,500,000 3,100,000  
Period to sell loans from the date of closing 1 month    
Accrued additional interest income 700,000 1,200,000 1,200,000
Cumulative charge-offs against noncovered nonaccrual loans 6,000,000 8,200,000  
Interest income recognized on troubled debt restructurings 1,000,000 2,200,000 1,900,000
Troubled debt restructuring default period 90 days    
Troubled debt restructuring Period 12 months    
Loans and Leases Receivable, Impaired, Commitment to Lend 0 0  
Real Estate Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Unpaid principal of mortgage loans serviced for others $ 410,300,000 $ 390,700,000