CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net Cash Provided By Used In Operating Activities Abstract
Net Income (Loss) Attributable to Parent	$ 48,408	$ 10,132
Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities Abstract
Provision for loan losses	100,723	75,319
Amortization of intangibles	2,593	2,255
Depreciation, Nonproduction	11,756	12,060
Net (accretion of discounts) amortization of premiums and deferred fees	(4,077)	(88,327)
Impairment Losses On Net Assets To Be Disposed Of	0	8,564
Impaiment losses on long-lives assets	0	0
Mortgage Servicing Rights MSR Impairment Recovery	(784)	6,171
Fair value change in equity appreciation instrument	0	(7,745)
FDIC loss share (income) expense	15,255	(13,621)
FDIC deposit insurance expense	24,926	17,673
Earnings from changes in fair value related to instruments measured at fair value pursuant to the fair value option	0	0
Adjustments (expense) to indemnity reserves on loans sold	3,875	9,848
Losses (earnings) from investments under equity method	(2,252)	(6,826)
Stock options expense	0	0
Deferred income tax expense (benefit)	4,418	140,915
Loss (gain) on: [Abstract]
Disposition of premises and equipment	(6,284)	(1,412)
Early extinguishment of debt	69	0
Sale and valuation adjustments of investment securities	0	0
Sale of loans, including valuation adjustments on loans held-for-sale	(15,471)	(7,244)
Sale of equity method investment	0	(16,666)
Sale of processing and technology business, net of transaction costs	0	0
Acquisitions of loans held-for-sale	(76,118)	(90,780)
Proceeds from sale of loans held-for-sale	63,460	45,448
Net disbursements on loans held-for-sale	(223,500)	(184,641)
Increase (Decrease) in Operating Assets [Abstract]
Trading securities	270,691	206,222
Accrued income receivable	(1,357)	2,988
Other assets	22,956	(4,602)
Increase (Decrease) in Accounts Payable and Accrued Liabilities [Abstract]
Interest payable	(2,249)	(4,410)
Increase Decrease In Employee Related Liabilities	4,720	(123,957)
Other liabilities	(2,421)	(38,203)
Total adjustments	190,929	(60,971)
Net cash (used in) provided by operating activities	239,337	(50,839)
Net Cash Provided By Used In Investing Activities Abstract
Net increase in money market investments	71,911	17,730
Payments To Acquire Investments Abstract
Available-for-sale	(529,445)	(752,479)
Held-to-maturity	(250)	(51,998)
Other	(47,629)	(38,305)
Proceeds From Sale Maturity And Collections Of Investments Abstract
Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities	388,472	278,274
Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities	1,539	27,335
Other	31,800	27,050
Proceeds from sale of investment securities available-for-sale	0	0
Proceeds From Sale Of Other Investments	0	0
Net repayments on loans	191,073	427,622
Proceeds From Sale Of Loans Receivable	21,304	200,387
Acquisition of loan portfolios	(140,005)	(348,226)
Payments Received From F D I C Sharing Agreements	20,896	583
Cash received from acquisitions	0	0
Proceeds From Sale Of Equity Method Investments	0	31,068
Net proceeds from sale of processing and technology business	0	0
Mortgage servicing rights purchased	(474)	(383)
Acquisition of premises and equipment	(12,298)	(18,599)
Proceeds from sale of: [Abstract]
Premises and equipment	11,946	7,763
Foreclosed assets	25,923	44,648
Net cash (used in) provided by investing activities	34,763	(147,530)
Net increase (decrease) in: [Abstract]
Deposits	(745,906)	433,505
Federal funds purchased and assets sold under agreements to repurchase	(27,541)	230,250
Other short-term borrowings	455,000	(73,920)
Payments of notes payable	(22,284)	(622,568)
Proceeds From Notes Payable	2,719	242,000
Proceeds from issuance of common stock	2,062	2,247
Proceeds From Issuance Or Sale Of Equity	0	0
Dividends paid	(620)	(930)
Treasury stock acquired	(6)	(33)
Net cash (used in) provided by financing activities	(336,576)	210,551
Net (decrease) increase in cash and due from banks	(62,476)	12,182
Cash and due from banks at beginning of period	535,282	452,373
Cash and due from banks at end of period	$ 472,806	$ 464,555