CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net Income	$ (362,332)	$ 436,296
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses	215,378	545,927
Amortization of intangibles	7,351	7,403
Depreciation and amortization of premises and equipment	35,407	37,056
Net (accretion of discounts) amortization of premiums and deferred fees	298,318	(48,195)
FDIC loss share (income) expense	84,331	44,887
Adjustments (expense) to indemnity reserves on loans sold	27,281	30,162
Losses (earnings) from investments under equity method	(31,930)	(42,740)
Deferred income tax expense (benefit)	34,175	(303,038)
Loss (gain) on: [Abstract]
Disposition of premises and equipment	(2,578)	(3,060)
Net Gain Loss On Sale And Valuation Adjustments On Investment Securities	1,763	0
Gain Loss On Sales Of Loans Net Including Mortgage Banking Activities	(69,391)	37,564
Sale of stock in equity method investee	0	(312,589)
Gains Losses On Sales Of Other Real Estate	13,147	45,045
Disposal of discontinued business	(28,025)	0
Acquisitions of loans held-for-sale	(232,430)	(15,335)
Proceeds from sale of loans held-for-sale	97,638	168,046
Net disbursements on loans held-for-sale	(512,521)	(1,169,094)
Increase (Decrease) in Operating Assets [Abstract]
Trading securities	883,035	1,193,265
Accrued income receivable	11,437	2,847
Other assets	124,669	(610)
Increase (Decrease) in Accounts Payable and Accrued Liabilities [Abstract]
Interest payable	(11,747)	(9,480)
Pension and other postretirement benefit obligations	(4,478)	6,459
Other liabilities	33,821	(22,590)
Total adjustments	1,179,586	198,792
Net cash (used in) provided by operating activities	817,254	635,088
Cash flows from investing activities:
Net increase in money market investments	(194,668)	123,792
Payments To Acquire Investments Abstract
Available-for-sale	(1,825,654)	(1,661,080)
Held-to-maturity	(1,000)	(250)
Other	(97,301)	(145,691)
Proceeds From Sale Maturity And Collections Of Investments Abstract
Available-for-sale	1,327,672	1,576,112
Held-to-maturity	29,834	4,278
Other	90,530	132,270
Proceeds from sale of investment securities available-for-sale	91,298	0
Proceeds From Sale Of Other Investments	27,356	0
Net repayments on loans	628,571	1,014,907
Proceeds from sale of loans	233,527	310,767
Acquisition of loan portfolios	(356,710)	(1,727,454)
Net Payments From FDIC Under Loss Sharing Agreements	179,250	52,758
Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital	0	438
Proceeds From Sale Of Stock In Equity Method Investee	0	363,492
Net cash disbursed from disposal of discontinued business	(233,967)	0
Mortgage servicing rights purchased	0	(45)
Acquisition of premises and equipment	(39,604)	(27,214)
Proceeds from sale of: [Abstract]
Premises and equipment	12,144	9,438
Foreclosed assets	110,677	200,546
Net cash (used in) provided by investing activities	(18,045)	227,064
Net increase (decrease) in: [Abstract]
Deposits	(212,264)	(642,427)
Federal funds purchased and assets sold under agreements to repurchase	(8,580)	(223,544)
Other short-term borrowings	(400,000)	190,000
Payments of notes payable	(1,047,546)	(331,835)
Proceeds from issuance of notes payable	781,905	73,154
Proceeds from issuance of common stock	4,323	4,952
Dividends paid	(2,792)	(2,792)
Repurchase of TARP related warrants	(3,000)	0
Net Payments For Repurchase Of Common Stock	(3,052)	(433)
Net cash (used in) provided by financing activities	(891,006)	(932,925)
Net (decrease) increase in cash and due from banks	(91,797)	(70,773)
Cash and due from banks at beginning of period	423,211	439,363
Cash and due from banks at end of period, including discontinued operations	331,414	368,590
Cash from discontinued operations	9,500	0
Cash and due from banks at end of period	321,914	368,590
Segment, Discontinued Operations [Member]
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses	(6,764)	(1,345)
Goodwill Written Off Related To Business Unit To Be Disposed	186,511	0
Net increase (decrease) in: [Abstract]
Cash from discontinued operations	9,500
Mortgage Banking Activities [Member]
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Mortgage Servicing Rights MSR Impairment Recovery	$ 18,424	$ 6,862