CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net Income	$ 207,161	$ 114,147
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses	473,264	219,922
Amortization of intangibles	4,935	5,124
Depreciation and amortization of premises and equipment	25,009	23,282
Net (accretion of discounts) amortization of premiums and deferred fees	(29,525)	(15,677)
Fair value adjustments of mortgage servicing rights	10,741	4,791
Fair value change in equity appreciation instrument	0	0
FDIC loss share (income) expense	30,021	12,680
Amortization Of Prepaid F D I C Assesment	0	47,833
Adjustments (expense) to indemnity reserves on loans sold	27,775	9,273
Losses (earnings) from investments under equity method	(34,214)	(21,681)
Deferred income tax expense (benefit)	(321,854)	(154,686)
Loss (gain) on: [Abstract]
Disposition of premises and equipment	(2,347)	(6,864)
Early extinguishment of debt	0	24,950
Net Gain Loss On Sale And Valuation Adjustments On Investment Securities	0	349
Sale of loans, including valuation adjustments on loans held-for-sale	44,577	(74)
Sale of stock in equity method investee	(136,722)	0
Gains (Losses) on Sales of Other Assets	0	(2,545)
Gains Losses On Sales Of Other Real Estate	35,006	5,268
Acquisitions of loans held-for-sale	(15,335)	(174,632)
Proceeds from sale of loans held-for-sale	119,003	145,588
Net disbursements on loans held-for-sale	(867,917)	(542,282)
Increase (Decrease) in Operating Assets [Abstract]
Trading securities	858,092	543,077
Accrued income receivable	(18,177)	2,889
Other assets	2,103	(99,236)
Increase (Decrease) in Accounts Payable and Accrued Liabilities [Abstract]
Interest payable	(2,570)	(4,499)
Pension and other postretirement benefit obligations	3,786	16,165
Other liabilities	4,055	11,364
Total adjustments	209,706	50,379
Net cash (used in) provided by operating activities	416,867	164,526
Cash flows from investing activities:
Net increase in money market investments	13,641	426,346
Payments To Acquire Investments Abstract
Available-for-sale	(1,490,647)	(890,777)
Held-to-maturity	0	(250)
Other	(116,731)	(76,033)
Proceeds From Sale Maturity And Collections Of Investments Abstract
Available-for-sale	1,378,311	780,832
Held-to-maturity	2,359	1,548
Other	83,592	81,626
Net repayments on loans	624,262	539,177
Proceeds from sale of loans	295,237	41,476
Acquisition of loan portfolios	(1,520,088)	(705,819)
Net payments (to) from the FDIC under the loss sharing agreements	(107)	262,807
Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital	438	130,419
Proceeds from sale of stock in equity method investee	166,332	0
Mortgage servicing rights purchased	(45)	(1,018)
Acquisition of premises and equipment	(19,774)	(21,927)
Proceeds from sale of: [Abstract]
Premises and equipment	5,891	15,610
Proceeds from Sale of Other Productive Assets	0	1,026
Foreclosed assets	120,365	93,480
Net cash (used in) provided by investing activities	(456,964)	678,523
Net increase (decrease) in: [Abstract]
Deposits	(259,950)	(528,508)
Federal funds purchased and assets sold under agreements to repurchase	(344,047)	(363,354)
Other short-term borrowings	590,000	20,000
Payments of notes payable	(48,458)	(22,552)
Proceeds from issuance of notes payable	49,874	29,802
Proceeds from issuance of common stock	3,232	3,320
Dividends paid	(1,551)	(1,551)
Treasury stock acquired	(325)	(150)
Net cash (used in) provided by financing activities	(11,225)	(862,993)
Net (decrease) increase in cash and due from banks	(51,322)	(19,944)
Cash and due from banks at beginning of period	439,363	535,282
Cash and due from banks at end of period	$ 388,041	$ 515,338