Loans And Leases (Interest Income From Impaired Loans And Leases, By Class) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 381,678	$ 454,784	$ 532,187
Accrued Interest Income	13,129	15,489	17,979
Cash Basis Interest Income	3,678	1,697	1,753
Residential [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	144,908	141,128	128,913
Accrued Interest Income	4,119	4,494	3,909
Cash Basis Interest Income	1,954	1,150	1,269
Residential 1-4 family [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	144,776	140,931	128,846
Accrued Interest Income	4,117	4,490	3,902
Cash Basis Interest Income	1,952	1,148	1,268
Construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	132	197	67
Accrued Interest Income	2	4	7
Cash Basis Interest Income	2	2	1
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	53,486	45,711	34,393
Accrued Interest Income	1,003	1,621	1,299
Cash Basis Interest Income	1,724	547	484
Home equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	46,666	39,454	28,909
Accrued Interest Income	852	1,349	1,062
Cash Basis Interest Income	1,409	461	372
Liquidating-home equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	6,820	6,253	5,477
Accrued Interest Income	151	272	237
Cash Basis Interest Income	315	86	112
Other consumer [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	0	4	7
Accrued Interest Income	0	0	0
Cash Basis Interest Income	0	0	0
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	60,813	88,322	127,985
Accrued Interest Income	2,889	3,852	4,780
Cash Basis Interest Income	0	0	0
Commercial non-mortgage [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	60,813	87,393	120,152
Accrued Interest Income	2,889	3,852	4,529
Cash Basis Interest Income	0	0	0
Asset-based [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	0	929	7,833
Accrued Interest Income	0	0	251
Cash Basis Interest Income	0	0	0
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	121,376	176,999	230,523
Accrued Interest Income	5,096	5,477	7,913
Cash Basis Interest Income	0	0	0
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	106,085	155,384	184,856
Accrued Interest Income	4,476	4,847	6,499
Cash Basis Interest Income	0	0	0
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	3,593	7,279	21,835
Accrued Interest Income	249	285	887
Cash Basis Interest Income	0	0	0
Residential development [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	11,698	14,336	23,832
Accrued Interest Income	371	345	527
Cash Basis Interest Income	0	0	0
Equipment financing [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,095	2,624	10,373
Accrued Interest Income	22	45	78
Cash Basis Interest Income	0	0	0
Equipment financing [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,095	2,624	10,373
Accrued Interest Income	22	45	78
Cash Basis Interest Income	$ 0	$ 0	$ 0