Loans and Leases (Schedule Of Troubled Debt Restructurings Balance And Activity) (Detail) (USD $)	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Troubled Debt Restructurings Balance And Activity [Line Items]
Performing TDRs, end of period	$ 42,418,000				$ 42,418,000				$ 72,133,000
TDRs [Member]
Troubled Debt Restructurings Balance And Activity [Line Items]
Performing TDRs, beginning of period	40,938,000		63,822,000		72,133,000		67,775,000		67,775,000
New restructurings as TDRs	2,684,000		13,336,000		6,767,000		38,405,000
Repayments and payoffs	(848,000)		(830,000)		(1,853,000)		(4,080,000)
Charge-offs after restructuring	(26,000)		(9,000)		(455,000)		(6,734,000)
Transfer to nonaccrual, past due 90 days or greater, non-performing TDRs	(281,000)		(5,407,000)		(5,969,000)		(11,449,000)
Transfer out of TDR status	(49,000)	[1]	(938,000)	[1]	(28,204,000)	[1]	(13,551,000)	[1]
Other, net	0		1,000		(1,000)		(391,000)	[2]
Performing TDRs, end of period	42,418,000		69,975,000		42,418,000		69,975,000		72,133,000
Non-performing TDRs, end of period	19,522,000	[3],[4]	22,166,000	[3]	19,522,000	[3],[4]	22,166,000	[3]	22,676,000	[4]
Performing TDRs	68.00%		76.00%		68.00%		76.00%		76.00%
Non-performing TDRs	32.00%		24.00%		32.00%		24.00%		24.00%
Transferred To OREO							$ 203,000

[1] Loans that have performed in accordance with the renegotiated terms for a minimum of six consecutive months with payments and at the time of renegotiation the loan's interest rate represented a then current market interest rate for a loan of similar risk.

[2] Includes $203 transferred to OREO in 2013.

[3] Included in Age Analysis of Past Due Financing Receivables.

[4] These loans are included in the 90 day past due and nonaccrual categories.