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		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Other Income [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (229,000)	$ 0	$ (432,000)	$ 0
Amount of Gain or (Loss) Recognized in Income on Hedged Item	266,000	0	482,000	0
Income Statement Gain/(Loss) due to Hedge Ineffectiveness	$ 37,000	$ 0	$ 50,000	$ 0