Allowance For Loan Losses (Schedule Of Impaired Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded investment	$ 3,885	$ 4,749
With no related allowance recorded, Unpaid principal balance	7,874	8,738
With an allowance recorded, Recorded investment	5,782	2,832
With an allowance recorded, Unpaid principal balance	5,782	2,832
With an allowance recorded, Related allowance	647	665
Commercial and industrial
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded investment	849	1,611
With no related allowance recorded, Unpaid principal balance	3,013	3,775
With an allowance recorded, Recorded investment	0	0
With an allowance recorded, Unpaid principal balance	0	0
With an allowance recorded, Related allowance	0	0
Commercial real estate
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded investment	3,036	3,138
With no related allowance recorded, Unpaid principal balance	4,861	4,963
With an allowance recorded, Recorded investment	5,782	2,832
With an allowance recorded, Unpaid principal balance	5,782	2,832
With an allowance recorded, Related allowance	$ 647	$ 665