Assets And Liabilities Subject To Offsetting (Schedule Of Securities Sold Under Agreements To Repurchase) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Offsetting Liabilities [Line Items]
Repurchase Agreements, Gross Amounts of Recognized Liabilities	$ 9,309	$ 7,925
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	9,309	7,925
Repurchase Agreements, Gross amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	0	0
Repurchase Agreements, Net Amount	(196)	(1,676)
U.S. Agency Mortgage-Backed, Residential [Member]
Offsetting Liabilities [Line Items]
Repurchase Agreements, Gross amounts Not Offset in the Statements of Condition, Financial Instruments	(9,505)	(9,601)
U.S. Agency [Member]
Offsetting Liabilities [Line Items]
Repurchase Agreements, Gross amounts Not Offset in the Statements of Condition, Financial Instruments	$ 0	$ 0