Derivative Financial Instruments (Derivatives Used To Hedge Changes In Fair Value Attributable To Interest Rate Risk) (Detail) (Other Income [Member], Interest Rate Contract [Member], USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other Income [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (11,000)	$ 0
Amount of Gain or (Loss) Recognized in Income on Hedged Item	10,000	0
Income Statement Gain/(Loss) due to Hedge Ineffectiveness	$ (1,000)	$ 0