Business Segment Information (Schedule Of Consolidated Revenue, Expenses, Tax And Assets) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net interest income	$ 172,860	$ 182,064	$ 345,615	$ 362,459
Provision for loan losses	1,000	70,000	2,000	175,000
Noninterest income	188,772	243,937	386,314	487,186
Noninterest expense	345,826	337,311	660,973	675,290
Income/(loss) before income taxes	14,806	18,690	68,956	(645)
Provision/(benefit) for income taxes	(4,242)	(1,659)	7,866	(18,177)
Income from continuing operations	19,048	20,349	61,090	17,532
Income/(loss) from discontinued operations, net of tax	3,788	129	4,748	(6,947)
Net income/(loss)	22,836	20,478	65,838	10,585
Average assets	24,518,015	25,600,578	24,543,948	25,580,107
Regional Banking [Member]
Net interest income	137,080	138,179	272,582	272,036
Provision for loan losses	(13,743)	27,975	(26,143)	80,022
Noninterest income	68,881	74,652	136,251	145,577
Noninterest expense	146,892	153,964	298,013	310,587
Income/(loss) before income taxes	72,812	30,892	136,963	27,004
Provision/(benefit) for income taxes	26,680	11,213	50,135	9,427
Net income/(loss)	46,132	19,679	86,828	17,577
Average assets	11,090,295	11,237,708	11,073,610	11,264,974
Capital Markets [Member]
Net interest income	5,564	4,824	11,140	7,188
Noninterest income	77,925	100,975	168,005	215,559
Noninterest expense	103,383	78,066	176,946	161,943
Income/(loss) before income taxes	(19,894)	27,733	2,199	60,804
Provision/(benefit) for income taxes	(7,736)	10,384	698	22,766
Net income/(loss)	(12,158)	17,349	1,501	38,038
Average assets	2,249,831	2,077,434	2,150,290	1,979,558
Corporate [Member]
Net interest income	445	1,113	175	6,670
Provision for loan losses
Noninterest income	9,007	4,925	21,878	29,832
Noninterest expense	36,286	11,833	56,957	32,322
Income/(loss) before income taxes	(26,834)	(5,795)	(34,904)	4,180
Provision/(benefit) for income taxes	(18,843)	(10,392)	(29,375)	(15,466)
Net income/(loss)	(7,991)	4,597	(5,529)	19,646
Average assets	5,086,989	4,940,675	5,098,012	4,748,205
Non-Strategic [Member]
Net interest income	29,771	37,948	61,718	76,565
Provision for loan losses	14,743	42,025	28,143	94,978
Noninterest income	32,959	63,385	60,180	96,218
Noninterest expense	59,265	93,448	129,057	170,438
Income/(loss) before income taxes	(11,278)	(34,140)	(35,302)	(92,633)
Provision/(benefit) for income taxes	(4,343)	(12,864)	(13,592)	(34,904)
Income from continuing operations	(6,935)	(21,276)	(21,710)	(57,729)
Income/(loss) from discontinued operations, net of tax	3,788	129	4,748	(6,947)
Net income/(loss)	(3,147)	(21,147)	(16,962)	(64,676)
Average assets	$ 6,090,900	$ 7,344,761	$ 6,222,036	$ 7,587,370