CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES
Net income after extraordinary items	$ 245,234	$ 164,564	$ 76,642
Adjustments to reconcile net income after extraordinary items to net cash provided by operating activities:
Depreciation and amortization	67,460	57,593	81,901
(Accretion) of discount and amortization of premiums, net	(210,868)	(235,988)	(116,770)
Decrease in FDIC indemnification asset and receivable	100,141	83,213	23,338
Gain on acquisition		(22,874)	(471,009)
Net impairment loss on investment securities available-for-sale recognized in earnings	633	16,669	107,671
Stock compensation costs	13,543	8,761	5,549
Deferred tax expenses	189,497	12,377	127,132
Provision for loan losses	95,006	200,159	528,666
Impairment on other real estate owned	29,266	49,669	7,759
Net gain on sales of investment securities, loans and other assets	(30,998)	(51,776)	(6,340)
Originations and purchases of loans held for sale	(72,761)	(42,985)	(65,047)
Proceeds from sales of loans held for sale	41,388	42,059	37,127
Prepayment penalty for Federal Home Loan Bank advances and other borrowings	12,281	13,832	2,370
Net proceeds from FDIC shared-loss agreements	159,983	331,500
Net change in accrued interest receivable and other assets	(146,911)	87,009	(143,966)
Net change in accrued expenses and other liabilities	(233,868)	157,275	(39,498)
Other net operating activities	(3,709)	(1,861)	(250)
Total adjustments	10,083	704,632	78,633
Net cash provided by operating activities	255,317	869,196	155,275
CASH FLOWS FROM INVESTING ACTIVITIES
Net cash acquired in acquisitions		67,186	599,036
Net (increase) decrease in loans	(934,773)	498,187	467,149
Net decrease (increase) in short-term investments	81,726	103,285	(18,404)
Purchases of:
Securities purchased under resale agreements	(1,292,066)	(950,000)	(30,044)
Investment securities held-to-maturity			(551,608)
Investment securities available-for-sale	(2,713,546)	(4,207,000)	(1,976,701)
Loans receivable	(675,298)	(861,490)	(530,345)
Federal Reserve Bank stock	(227)	(10,500)	(9,196)
Premises and equipment	(10,507)	(90,931)	(179)
Investments in affordable housing partnerships	(36,642)	(42,833)	(10,989)
Proceeds from sale of:
Investment securities available-for-sale	702,616	1,338,910	1,650,680
Loans receivable	188,407	473,961	299,322
Loans held for sale originated for investment	611,291	367,404
Other real estate owned	177,015	140,710	81,825
Premises and equipment	9,227	112	18
Investments in affordable housing partnerships	7,100	2,000
Other investments	2,454
Repayments, maturities and redemptions of investment securities available-for-sale	1,780,457	2,564,157	1,477,470
Paydowns, maturities and termination of securities purchased under resale agreements	1,005,632	680,000
Redemption of Federal Home Loan Bank stock	25,908	20,075
Net cash (used in) provided by investing activities	(1,071,226)	93,233	1,448,034
Net increase (decrease) in:
Deposits	1,812,375	254,985	325,211
Short-term borrowings	(63,337)	40,095	(2,215,097)
Proceeds from:
FHLB advances		550,000
Issuance of common stock pursuant to various stock plans and agreements	5,726	4,454	949
Issuance of preferred stock, net of stock issuance costs, and common stock warrants			335,047
Issuance of common stock from public offering			80,328
Issuance of common stock from private placement			192,454
Payment for:
Repayment of FHLB advances	(760,274)	(1,198,312)
Repayment of long-term debt	(23,918)
Repayment of notes payable and other borrowings	(11,250)	(43,365)	(51,558)
Repurchase of Series B preferred stock		(306,546)
Issuance and conversion costs of preferred stock and common stock			(20,320)
Repurchase of common stock warrants	(14,500)
Cash dividends	(30,679)	(29,605)	(29,662)
Other net financing activities	68	(1,377)	(430)
Net cash provided by (used in) financing activities	914,211	(729,671)	(1,383,078)
Effect of exchange rate changes on cash and cash equivalents	(1,066)	2,107
NET INCREASE IN CASH AND CASH EQUIVALENTS	97,236	234,865	220,231
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	1,333,949	1,099,084	878,853
CASH AND CASH EQUIVALENTS, END OF YEAR	1,431,185	1,333,949	1,099,084
Cash paid during the year for:
Interest	175,772	206,706	230,667
Income tax payments, net of refunds	326,725	(60,621)	(21,180)
Noncash investing and financing activities:
Transfers to other real estate owned/affordable housing partnership	175,551	270,995	135,844
Conversion of preferred stock to common stock	31	325,299
Loans to facilitate sales of other real estate owned	8,882	15,888	40,687
Loans to facilitate sales of loans	27,149	45,522
Loans to facilitate sale of premises and equipment	11,100
Loans transferred to loans held for sale	644,915	563,974
Issuance of common stock in lieu of Board of Directors retainer fees	520	281	219
Transfers from investment securities held-to-maturity to available-for-sale			681,404
Desecuritization of loans receivable			635,614
Transfers from other real estate owned/affordable housing partnership			13,982
Accrued preferred stock dividend			852
Amortization of preferred stock discount		$ 21,042	$ 3,847