Allowance For Loan Losses (Schedule Of Impaired Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded investment	$ 6,631	$ 3,885
With no related allowance recorded, Unpaid principal balance	10,620	7,874
With an allowance recorded, Recorded investment	2,975	5,782
With an allowance recorded, Unpaid principal balance	2,975	5,782
Related allowance	172	647
Commercial and industrial
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded investment	849	849
With no related allowance recorded, Unpaid principal balance	3,013	3,013
With an allowance recorded, Recorded investment	0	0
With an allowance recorded, Unpaid principal balance	0	0
Related allowance	0	0
Commercial real estate
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded investment	5,782	3,036
With no related allowance recorded, Unpaid principal balance	7,607	4,861
With an allowance recorded, Recorded investment	2,975	5,782
With an allowance recorded, Unpaid principal balance	2,975	5,782
Related allowance	$ 172	$ 647