Loans And Leases (Interest Income From Impaired Loans And Leases, By Class) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			$ 398,664	$ 479,281
Total Interest Income	4,268	4,727	12,986	13,301
Residential [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			145,240	141,946
Total Interest Income	1,535	1,487	4,574	4,240
1-4 family [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			145,107	141,749
Total Interest Income	1,533	1,485	4,570	4,236
Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			133	197
Total Interest Income	2	2	4	4
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			53,850	49,449
Total Interest Income	663	765	2,049	1,599
Home equity loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			46,962	41,724
Total Interest Income	551	633	1,700	1,336
Liquidating portfolio-home equity loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			6,888	7,721
Total Interest Income	112	132	349	263
Other consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			0	4
Total Interest Income	0	0	0	0
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			65,808	94,076
Total Interest Income	794	830	2,187	3,035
Commercial non-mortgage [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			65,808	93,090
Total Interest Income	794	830	2,187	3,035
Asset-based loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			0	986
Total Interest Income	0	0	0	0
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			132,630	191,603
Total Interest Income	1,270	1,632	4,157	4,391
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			116,307	170,213
Total Interest Income	1,109	1,479	3,675	3,921
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			3,593	7,307
Total Interest Income	62	70	196	216
Residential development [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			12,730	14,083
Total Interest Income	99	83	286	254
Equipment financing [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			1,136	2,207
Total Interest Income	$ 6	$ 13	$ 19	$ 36