Derivative Financial Instruments 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		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ 17	$ (26)	$ (15)	$ (43)
Amount of Gain or (Loss) Recognized in Income on Hedged Item	(15)	25	13	40
Income Statement Gain/(Loss) due to Hedge Ineffectiveness	$ 2	$ (1)	$ (2)	$ (3)