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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ (1,785)	$ 116	$ 286	$ (255)
Other Non-Interest Income [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	170	65	10	449
Mortgage Banking Income [Member] | Mortgage Derivatives [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	$ (1,955)	$ 51	$ 276	$ (704)