Derivatives And Hedging (Schedule Of Interest Rate Contracts Reported At Fair Values) (Details) - Interest Rate Contracts [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative assets	$ 2,035	$ 126
Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2,035	126
Designated as Hedging Instrument [Member] | Other Liabilities, Net [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 0	$ 0