Derivative Financial Instruments (Schedule Of Gains And Losses Related To Derivative Instruments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Gain or (Loss) on Derivatives  Recognized in OCI	$ 2,403	$ (437)	$ (1,609)
Cash Flow Hedging | Interest expense
Derivative [Line Items]
Gain or (Loss) Reclassified from Accumulated OCI into Earnings	2,430	1,974
Cash Flow Hedging | Interest rate swap contracts
Derivative [Line Items]
Gain or (Loss) on Derivatives  Recognized in OCI	$ (27)	$ (2,411)