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, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on contracts	$ (116)	$ (418)	$ (506)
Gain (loss) on borrowings	116	418	506
Net settlements and accruals on contracts	236	3,140	1,274
Amount of gain (loss) recognized in income	$ 236	$ 3,140	$ 1,274