Hedge Accounting (Summary Of Hedged Transactions That Affect Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives (Effective Portion)	$ 1
Loss Reclassified from OCI into Income (Effective Portion)	60
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives (Effective Portion)	(1)	$ 243
Loss Reclassified from OCI into Income (Effective Portion)	60	29
Designated as Hedging Instrument [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss Reclassified from OCI into Income (Effective Portion)	60	29
Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives (Effective Portion)	$ (1)	$ 243