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Allowance For Loan Losses (Schedule Of Information Related To Average Recorded Investment And Interest Income Recognized On Impaired Loans) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]    
With no related allowance recorded, Average recorded investment $ 5,620 $ 6,138
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 69 14
With an allowance recorded, Average recorded investment 4,307 1,419
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method 149 24
Commercial and industrial    
Financing Receivable, Impaired [Line Items]    
With no related allowance recorded, Average recorded investment 1,086 2,099
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 0 0
With an allowance recorded, Average recorded investment 0 0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method 0 0
Commercial real estate    
Financing Receivable, Impaired [Line Items]    
With no related allowance recorded, Average recorded investment 4,534 4,039
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method 69 14
With an allowance recorded, Average recorded investment 4,307 1,419
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method $ 149 $ 24