Loans And Leases (Allowance For Loan And Lease Losses By Portfolio Segment) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 233,487	$ 321,665	$ 341,184
Provision (benefit) charged to expense	21,500	22,500	115,000
Losses charged off	(104,202)	(129,329)	(150,675)
Recoveries	26,344	18,651	16,156
Balance, end of period	177,129	233,487	321,665
Ending balance: individually evaluated for impairment	27,449	46,605	35,997
Ending balance: collectively evaluated for impairment	149,680	186,882	285,668
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	34,565	30,792	26,895
Provision (benefit) charged to expense	7,033	14,364	19,217
Losses charged off	(12,927)	(11,524)	(16,991)
Recoveries	803	933	1,671
Balance, end of period	29,474	34,565	30,792
Ending balance: individually evaluated for impairment	14,731	19,367	13,562
Ending balance: collectively evaluated for impairment	14,743	15,198	17,230
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	67,785	95,071	102,017
Provision (benefit) charged to expense	23,349	20,262	54,632
Losses charged off	(43,920)	(52,997)	(66,215)
Recoveries	7,040	5,449	4,637
Balance, end of period	54,254	67,785	95,071
Ending balance: individually evaluated for impairment	3,611	5,167	3,466
Ending balance: collectively evaluated for impairment	50,643	62,618	91,605
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	60,681	74,470	88,406
Provision (benefit) charged to expense	14,861	20,868	13,349
Losses charged off	(35,793)	(39,933)	(31,570)
Recoveries	6,817	5,276	4,285
Balance, end of period	46,566	60,681	74,470
Ending balance: individually evaluated for impairment	6,423	12,996	10,722
Ending balance: collectively evaluated for impairment	40,143	47,685	63,748
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	45,013	77,695	74,753
Provision (benefit) charged to expense	(6,495)	(10,505)	21,085
Losses charged off	(9,894)	(22,721)	(19,139)
Recoveries	2,210	544	996
Balance, end of period	30,834	45,013	77,695
Ending balance: individually evaluated for impairment	2,683	9,071	8,166
Ending balance: collectively evaluated for impairment	28,151	35,942	69,529
Financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	8,943	21,637	29,113
Provision (benefit) charged to expense	(12,748)	(16,989)	4,717
Losses charged off	(1,668)	(2,154)	(16,760)
Recoveries	9,474	6,449	4,567
Balance, end of period	4,001	8,943	21,637
Ending balance: individually evaluated for impairment	1	4	81
Ending balance: collectively evaluated for impairment	4,000	8,939	21,556
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	16,500	22,000	20,000
Provision (benefit) charged to expense	(4,500)	(5,500)	2,000
Losses charged off	0	0	0
Recoveries	0	0	0
Balance, end of period	12,000	16,500	22,000
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	$ 12,000	$ 16,500	$ 22,000