Investment Securities (Summary Of Sale Proceeds Of Available For Sale Securities) (Detail) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract]
Unsettled sales proceeds	$ 25,300,000				$ 25,300,000
Proceeds from sales of available-for-sale securities	16,380,000	[1]	7,740,000	[1]	38,075,000	[1]	44,261,000	[1]
Gains	1,812,000		269,000		6,148,000		708,000
Losses	(1,770,000)		0		(1,770,000)		0
OTTI Charges	(85,000)		0		(246,000)		0
Net	$ (43,000)		$ 269,000		$ 4,132,000		$ 708,000

[1] Proceeds from sales, for the three and nine months ended September 30, 2014, does not include $25.3 million of unsettled sales transactions at September 30, 2014. The gross realized gains and gross realized losses for the three and nine months ended September 30, 2014 reflect the unsettled sales transactions.