Derivative Instruments (Effect Of Fair Value Hedges On Consolidated Statements Of Income) (Details) - Not Designated As Hedging Instruments [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ (145)	$ 923
Other Non-Interest Income [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	6	(179)
Mortgage Banking Income [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ (151)	$ 1,102