Loans And Leases (Impaired Loans And Leases By Class) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 388,513	$ 467,005
Total Recorded Investment	349,060	414,292
Recorded Investment No Allowance	128,058	153,202
Recorded Investment With Allowance	221,002	261,090
Related Valuation Allowance	20,451	27,449
Residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	158,361	160,936
Total Recorded Investment	142,871	146,944
Recorded Investment No Allowance	23,988	24,423
Recorded Investment With Allowance	118,883	122,521
Related Valuation Allowance	10,534	14,731
Residential 1-4 family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	157,915	160,490
Total Recorded Investment	142,869	146,683
Recorded Investment No Allowance	23,987	24,267
Recorded Investment With Allowance	118,882	122,416
Related Valuation Allowance	10,534	14,726
Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	446	446
Total Recorded Investment	2	261
Recorded Investment No Allowance	1	156
Recorded Investment With Allowance	1	105
Related Valuation Allowance	0	5
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	63,886	68,603
Total Recorded Investment	52,179	54,793
Recorded Investment No Allowance	27,323	27,630
Recorded Investment With Allowance	24,856	27,163
Related Valuation Allowance	4,595	3,611
Home equity [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	54,991	56,815
Total Recorded Investment	45,577	47,755
Recorded Investment No Allowance	23,622	23,967
Recorded Investment With Allowance	21,955	23,788
Related Valuation Allowance	3,926	2,960
Liquidating-home equity [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	8,895	11,788
Total Recorded Investment	6,602	7,038
Recorded Investment No Allowance	3,701	3,663
Recorded Investment With Allowance	2,901	3,375
Related Valuation Allowance	669	651
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	59,279	90,627
Total Recorded Investment	52,199	69,426
Recorded Investment No Allowance	23,138	21,942
Recorded Investment With Allowance	29,061	47,484
Related Valuation Allowance	1,878	6,423
Commercial non-mortgage [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	59,279	90,627
Total Recorded Investment	52,199	69,426
Recorded Investment No Allowance	23,138	21,942
Recorded Investment With Allowance	29,061	47,484
Related Valuation Allowance	1,878	6,423
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	106,738	144,482
Total Recorded Investment	101,601	141,149
Recorded Investment No Allowance	53,399	77,426
Recorded Investment With Allowance	48,202	63,723
Related Valuation Allowance	3,444	2,683
Commercial real estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	95,013	123,861
Total Recorded Investment	90,976	121,193
Recorded Investment No Allowance	42,774	65,212
Recorded Investment With Allowance	48,202	55,981
Related Valuation Allowance	3,444	2,572
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	0	7,177
Total Recorded Investment	0	7,185
Recorded Investment No Allowance	0	7,185
Recorded Investment With Allowance	0	0
Related Valuation Allowance	0	0
Residential development [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	11,725	13,444
Total Recorded Investment	10,625	12,771
Recorded Investment No Allowance	10,625	5,029
Recorded Investment With Allowance	0	7,742
Related Valuation Allowance	0	111
Equipment financing [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	249	2,357
Total Recorded Investment	210	1,980
Recorded Investment No Allowance	210	1,781
Recorded Investment With Allowance	0	199
Related Valuation Allowance	0	1
Equipment financing [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	249	2,357
Total Recorded Investment	210	1,980
Recorded Investment No Allowance	210	1,781
Recorded Investment With Allowance	0	199
Related Valuation Allowance	$ 0	$ 1