Derivative Financial Instruments Derivative Financial Instruments (Derivatives Used To Hedge Changes In Fair Value Attributable To Interest Rate Risk) (Detail) (Fair Value Hedging [Member], Designated as Hedging Instrument [Member], Interest Rate Contract [Member], USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (17,000)	$ (11,000)
Amount of Gain or (Loss) Recognized in Income on Hedged Item	15,000	10,000
Income Statement Gain/(Loss) due to Hedge Ineffectiveness	$ (2,000)	$ (1,000)