Loans And Leases (Allowance For Loan And Lease Losses By Portfolio Segment) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 198,757	$ 281,243	$ 233,487	$ 321,665
Provision (benefit) charged to expense	5,000	5,000	14,000	20,000
Losses charged off	(23,980)	(33,816)	(80,830)	(98,156)
Recoveries	6,312	4,925	19,432	13,843
Balance, end of period	186,089	257,352	186,089	257,352
Ending balance: individually evaluated for impairment	30,923	48,231	30,923	48,231
Ending balance: collectively evaluated for impairment	155,166	209,121	155,166	209,121
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	32,063	28,476	34,565	30,792
Provision (benefit) charged to expense	1,110	7,551	5,398	11,305
Losses charged off	(3,262)	(2,652)	(10,329)	(8,969)
Recoveries	353	374	630	621
Balance, end of period	30,264	33,749	30,264	33,749
Ending balance: individually evaluated for impairment	15,420	18,301	15,420	18,301
Ending balance: collectively evaluated for impairment	14,844	15,448	14,844	15,448
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	62,237	82,369	67,785	95,071
Provision (benefit) charged to expense	9,740	282	20,836	13,978
Losses charged off	(9,234)	(12,609)	(30,634)	(41,488)
Recoveries	1,249	1,143	6,005	3,624
Balance, end of period	63,992	71,185	63,992	71,185
Ending balance: individually evaluated for impairment	7,795	4,908	7,795	4,908
Ending balance: collectively evaluated for impairment	56,197	66,277	56,197	66,277
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	48,768	65,842	60,681	74,470
Provision (benefit) charged to expense	2,944	9,595	8,223	14,702
Losses charged off	(8,642)	(14,628)	(29,312)	(31,100)
Recoveries	1,297	1,130	4,775	3,867
Balance, end of period	44,367	61,939	44,367	61,939
Ending balance: individually evaluated for impairment	4,552	13,781	4,552	13,781
Ending balance: collectively evaluated for impairment	39,815	48,158	39,815	48,158
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	36,506	66,286	45,013	77,695
Provision (benefit) charged to expense	(4,315)	(6,085)	(7,054)	(6,775)
Losses charged off	(2,655)	(3,376)	(9,569)	(14,501)
Recoveries	302	37	1,448	443
Balance, end of period	29,838	56,862	29,838	56,862
Ending balance: individually evaluated for impairment	3,153	11,236	3,153	11,236
Ending balance: collectively evaluated for impairment	26,685	45,626	26,685	45,626
Financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	5,433	18,270	8,943	21,637
Provision (benefit) charged to expense	(3,479)	(4,343)	(9,653)	(9,210)
Losses charged off	(187)	(551)	(986)	(2,098)
Recoveries	3,111	2,241	6,574	5,288
Balance, end of period	4,878	15,617	4,878	15,617
Ending balance: individually evaluated for impairment	3	5	3	5
Ending balance: collectively evaluated for impairment	4,875	15,612	4,875	15,612
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	13,750	20,000	16,500	22,000
Provision (benefit) charged to expense	(1,000)	(2,000)	(3,750)	(4,000)
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	12,750	18,000	12,750	18,000
Ending balance: individually evaluated for impairment	0	0	0	0
Ending balance: collectively evaluated for impairment	$ 12,750	$ 18,000	$ 12,750	$ 18,000