Loans and Leases (Schedule Of Troubled Debt Restructurings Balance And Activity) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Troubled Debt Restructurings Balance And Activity [Line Items]
Performing TDRs, end of period	$ 63,822				$ 63,822				$ 67,775
TDRs [Member]
Troubled Debt Restructurings Balance And Activity [Line Items]
Performing TDRs, beginning of period	65,773		72,081		67,775		72,852		72,852
New TDR Status	7,187		1,698		25,069		16,110
Paydowns	(1,013)		(6,171)		(3,250)		(6,217)
Charge-offs post modification	(6,604)		(827)		(6,725)		(827)
Transfer to nonaccrual, past due 90 days or greater	(1,212)		0		(6,042)		(4,796)
Cured	(272)		0		(12,613)		(10,371)
Other, net	(37)	[1]	(4)	[1]	(392)	[1]	26	[1]
Performing TDRs, end of period	63,822		66,777		63,822		66,777		67,775
Non-performing TDRs, end of period	20,500	[2],[3]	19,977	[2]	20,500	[2],[3]	19,977	[2]	24,603	[3]
Performing TDRs	76.00%		77.00%		76.00%		77.00%		73.00%
Non-performing TDRs	24.00%		23.00%		24.00%		23.00%		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.