Loans And Leases (Interest Income From Impaired Loans And Leases, By Class) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			$ 406,972	$ 454,914
Total Interest Income	4,278	4,265	8,718	8,574
Residential [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			146,716	136,020
Total Interest Income	1,563	1,363	3,039	2,753
1-4 family [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			146,455	135,902
Total Interest Income	1,563	1,361	3,037	2,751
Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			261	118
Total Interest Income	0	2	2	2
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			54,250	35,666
Total Interest Income	697	416	1,386	834
Home equity loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			47,343	30,592
Total Interest Income	578	352	1,149	703
Liquidating portfolio-home equity loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			6,907	5,071
Total Interest Income	119	64	237	131
Other consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			0	3
Total Interest Income	0	0	0	0
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			66,752	94,875
Total Interest Income	685	1,073	1,393	2,205
Commercial non-mortgage [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			66,752	93,846
Total Interest Income	685	1,073	1,393	2,205
Asset-based loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			0	1,029
Total Interest Income	0	0	0	0
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			138,071	185,132
Total Interest Income	1,327	1,404	2,887	2,759
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			121,710	163,422
Total Interest Income	1,165	1,250	2,566	2,442
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			3,593	7,350
Total Interest Income	67	72	134	146
Residential development [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			12,768	14,360
Total Interest Income	95	82	187	171
Equipment financing [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			1,183	3,221
Total Interest Income	$ 6	$ 9	$ 13	$ 23