Derivatives And Hedging (Summary Of Fair Value Interest Rate Contracts Activity) (Details) - Fair Value Hedges [Member] - Interest Rate Contracts [Member] - Interest Expense [Member] - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014		Sep. 30, 2015		Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Contracts		$ (116)		$ (723)		$ (506)		$ (1,241)
Gain (Loss) on Borrowings		116		723		506		1,241
Net Settlements and Accruals on Contracts		236	[1]	518	[1]	1,274	[2]	1,664	[2]
Amount of Gain (Loss) Recognized in Income	[3]	$ 236		$ 518		$ 1,274		$ 1,664

[1] Amounts in this caption include gain (loss) recognized in income on derivatives and net cash settlements.

[2] At September 30, 2015 and December 31, 2014, the credit loss balance on our tax increment revenue bonds was $31.0 million.

[3] No ineffectiveness was recognized during the respective periods.