CONSOLIDATED STATEMENTS OF CONDITION (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets
Cash And Due From Banks	$ 368,590	$ 439,363
Money Market Investments [Abstract]
Federal funds sold	0	33,515
Securities Purchased Under Agreements To Resell	222,396	213,462
Time deposits with other banks	739,392	838,603
Total money market investments	961,788	1,085,580
Trading Securities [Abstract]
Pledged securities with creditors' right to repledge	311,597	271,624
Other trading securities	27,251	42,901
Available For Sale Securities Abstract
Pledged securities with creditors' right to repledge	1,374,939	1,603,693
Other investment securities available-for-sale	3,761,679	3,480,508
Investment securities held-to-maturity, at amortized cost	140,355	142,817
Other investment securities, at lower of cost or realizable value	198,864	185,443
Loans held-for-sale, at lower of cost or fair value	124,532	354,468
Loans held-in-portfolio:
Loans held-in-portfolio	21,520,054	21,080,005
Covered Loans	3,076,009	3,755,972
Less- Unearned Income	92,871	96,813
Allowance for loan losses	642,928	730,607
Total loans held-in-portfolio, net	23,860,264	24,008,557
FDIC loss share asset	1,324,711	1,399,098
Premises and equipment, net	519,623	535,793
Accrued income receivable	122,881	125,728
Mortgage servicing assets, at fair value	161,445	154,430
Other Assets	1,803,478	1,569,578
Goodwill	647,757	647,757
Other intangible assets	46,892	54,295
Total assets	36,052,116	36,507,535
Deposits Abstract
Non-interest bearing	5,762,554	5,794,629
Interest bearing	20,632,500	21,205,984
Total deposits	26,395,054	27,000,613
Federal Funds Purchased and Securities Sold Under Agreements To Repurchase	1,793,208	2,016,752
Other short-term borrowings	826,200	636,200
Notes Payable	1,544,696	1,777,721
Other liabilities	1,099,073	966,249
Total liabilities	31,658,231	32,397,535
Stockholders Equity Abstract
Preferred stock	50,160	50,160
Common stock	1,034	1,032
Surplus	4,155,244	4,150,294
Accumulated deficit	445,330	11,826
Treasury stock	(877)	(444)
Accumulated other comprehensive (loss) income, net of tax	(257,006)	(102,868)
Total stockholders' equity	4,393,885	4,110,000
Total liabilities and stockholders' equity	36,052,116	36,507,535
Non Covered Under Loss Sharing Agreements With F D I C [Member]
Loans held-in-portfolio:
Other real estate owned	135,502	266,844
Covered Under Loss Sharing Agreements With F D I C [Member]
Loans held-in-portfolio:
Covered Loans	3,076,009	3,755,972
Other real estate owned	$ 159,968	$ 139,058