Derivative Financial Instruments (Derivatives Used To Hedge Changes In Fair Value Attributable To Interest Rate Risk) (Detail) - Fair Value Hedging - Designated as Hedging Instrument - Interest Rate Contract - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ 269	$ (323)	$ (614)	$ (338)
Amount of Gain or (Loss) Recognized in Income on Hedged Item	(234)	302	627	315
Income Statement Gain/(Loss) due to Hedge Ineffectiveness	$ 35	$ (21)	$ 13	$ (23)