Loans and Leases (Schedule Of Troubled Debt Restructurings Balance And Activity) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Troubled Debt Restructurings Balance And Activity [Line Items]
Performing TDRs, end of period	$ 69,975				$ 69,975				$ 67,775
TDRs [Member]
Troubled Debt Restructurings Balance And Activity [Line Items]
Performing TDRs, beginning of period	63,822		66,777		67,775		72,852		72,852
New TDR Status	13,336		7,635		38,405		12,958
Paydowns	(830)		(992)		(4,080)		(7,805)
Charge-offs post modification	(9)		(112)		(6,734)		(623)
Transfer to nonaccrual, past due 90 days or greater	(5,407)		(614)		(11,449)		(4,822)
Cured	(938)		(15,786)		(13,551)		(15,652)
Other, net	1	[1]	(85)	[1]	(391)	[1]	(85)	[1]
Performing TDRs, end of period	69,975		56,823		69,975		56,823		67,775
Non-performing TDRs, end of period	22,166	[2],[3]	17,895	[2]	22,166	[2],[3]	17,895	[2]	24,603	[3]
Performing TDRs	76.00%		76.00%		76.00%		76.00%		73.00%
Non-performing TDRs	24.00%		24.00%		24.00%		24.00%		27.00%
Transferred To OREO					$ 203

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

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

[3] These loans are included in the 90 day past due and non-accrual categories.