Assets And Liabilities Subject To Offsetting (Schedule Of Securities Sold Under Agreements To Repurchase) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Offsetting Liabilities [Line Items]
Repurchase Agreements, Gross Amounts of Recognized Liabilities	$ 31,061	$ 74,510
Repurchase Agreements, Gross Amounts Offset in the Statements of Condition	0	0
Repurchase Agreements, Net Amounts of Liabilities Presented in the Statements of Condition	31,061	74,510
Repurchase Agreements, Gross amounts Not Offset in the Statements of Condition, Cash Collateral Pledged	0	0
Repurchase Agreements, Net Amount	0	0
U.S. Agency Mortgage-Backed, Residential [Member]
Offsetting Liabilities [Line Items]
Repurchase Agreements, Gross amounts Not Offset in the Statements of Condition, Financial Instruments	(25,837)	(63,162)
U.S. Agency [Member]
Offsetting Liabilities [Line Items]
Repurchase Agreements, Gross amounts Not Offset in the Statements of Condition, Financial Instruments	$ (5,224)	$ (11,348)