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		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on contracts	$ (320)	$ (442)	$ (418)	$ (389)
Gain (loss) on borrowings	320	442	418	389
Net settlements and accruals on contracts	2,674	513	3,140	1,038
Amount of gain (loss) recognized in income	$ 2,674	$ 513	$ 3,140	$ 1,038