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, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 154,868	$ 163,442	$ 152,573	$ 177,129
Provision (benefit) charged to expense	9,500	8,500	27,750	24,500
Losses charged off	(11,567)	(16,951)	(34,442)	(56,593)
Recoveries	3,681	2,554	10,601	12,509
Balance, end of period	156,482	157,545	156,482	157,545
Individually evaluated for impairment	21,230	23,311	21,230	23,311
Collectively evaluated for impairment	135,252	134,234	135,252	134,234
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	19,054	26,876	20,580	29,474
Provision (benefit) charged to expense	2,006	1,075	2,711	2,835
Losses charged off	(1,870)	(3,800)	(4,868)	(8,848)
Recoveries	261	152	1,028	842
Balance, end of period	19,451	24,303	19,451	24,303
Individually evaluated for impairment	11,501	13,003	11,501	13,003
Collectively evaluated for impairment	7,950	11,300	7,950	11,300
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	33,867	49,659	39,551	54,254
Provision (benefit) charged to expense	5,357	(1,732)	7,530	7,328
Losses charged off	(6,329)	(5,827)	(16,501)	(23,565)
Recoveries	1,947	1,188	4,262	5,271
Balance, end of period	34,842	43,288	34,842	43,288
Individually evaluated for impairment	4,165	3,281	4,165	3,281
Collectively evaluated for impairment	30,677	40,007	30,677	40,007
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	51,632	43,847	47,706	46,566
Provision (benefit) charged to expense	2,051	3,783	10,716	8,902
Losses charged off	(2,738)	(3,245)	(9,571)	(13,740)
Recoveries	1,017	426	3,111	3,083
Balance, end of period	51,962	44,811	51,962	44,811
Individually evaluated for impairment	1,717	1,630	1,717	1,630
Collectively evaluated for impairment	50,245	43,181	50,245	43,181
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	34,144	28,457	29,883	30,834
Provision (benefit) charged to expense	68	6,046	6,633	9,146
Losses charged off	(139)	(4,069)	(2,991)	(10,339)
Recoveries	120	105	668	898
Balance, end of period	34,193	30,539	34,193	30,539
Individually evaluated for impairment	3,818	5,397	3,818	5,397
Collectively evaluated for impairment	30,375	25,142	30,375	25,142
Equipment financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	5,539	3,603	3,912	4,001
Provision (benefit) charged to expense	344	(672)	795	(2,711)
Losses charged off	(491)	(10)	(511)	(101)
Recoveries	336	683	1,532	2,415
Balance, end of period	5,728	3,604	5,728	3,604
Individually evaluated for impairment	29	0	29	0
Collectively evaluated for impairment	5,699	3,604	5,699	3,604
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	10,632	11,000	10,941	12,000
Provision (benefit) charged to expense	(326)	0	(635)	(1,000)
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	10,306	11,000	10,306	11,000
Individually evaluated for impairment	0	0	0	0
Collectively evaluated for impairment	$ 10,306	$ 11,000	$ 10,306	$ 11,000