Derivatives And Hedging (Summary Of Fair Value Interest Rate Contracts Activity (Details) - Fair Value Hedging [Member] - Interest Rate Contracts [Member] - Interest Expense, Net [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Gain (Loss) on Contracts	$ (1,228)	$ (1,386)	$ (4,643)
Gain (Loss) on Borrowings	1,228	1,386	4,643
Net Settlements and Accruals on Contracts	2,030	2,179	4,082
Amount of Gain (Loss) Recognized in Income	$ 2,030	$ 2,179	$ 4,082