CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 281,650	$ 245,234	$ 164,564
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	82,536	67,460	57,593
(Accretion) of discount and amortization of premiums, net	(233,607)	(210,868)	(235,988)
Decrease in FDIC indemnification asset and receivable	122,251	100,141	83,213
Gain on acquisition			(22,874)
Net impairment loss on investment securities available-for-sale recognized in earnings	99	633	16,669
Stock compensation costs	13,238	13,543	8,761
Deferred tax (benefit) expenses	(12,650)	189,497	12,377
Provision for loan losses	65,184	95,006	200,159
Impairment on other real estate owned	16,035	29,266	49,669
Net gain on sales of investment securities, loans and other assets	(28,165)	(30,998)	(51,776)
Originations and purchases of loans held for sale	(103,059)	(72,761)	(42,985)
Proceeds from sales of loans held for sale	13,844	41,388	42,059
Prepayment penalty for Federal Home Loan Bank advances and other borrowings, net	6,860	12,281	13,832
Net proceeds from FDIC shared-loss agreements	76,094	159,983	331,500
Net change in accrued interest receivable and other assets	(23,393)	(146,911)	87,009
Net change in accrued expenses and other liabilities	15,086	(233,868)	157,275
Other net operating activities	(4,477)	(3,709)	(1,861)
Total adjustments	5,876	10,083	704,632
Net cash provided by operating activities	287,526	255,317	869,196
CASH FLOWS FROM INVESTING ACTIVITIES
Net cash acquired in acquisitions			67,186
Net (increase) decrease in Loans	(337,685)	(934,773)	498,187
Net (increase) decrease in Short-term investments	(304,544)	81,726	103,285
Purchases of:
Securities purchased under resale agreements	(1,400,000)	(1,292,066)	(950,000)
Investment securities available-for-sale	(1,835,823)	(2,713,546)	(4,207,000)
Loans receivable	(461,878)	(675,298)	(861,490)
Premises and equipment	(10,280)	(10,507)	(90,931)
Investments in affordable housing partnerships	(57,831)	(36,642)	(42,833)
Proceeds from sale of:
Investment securities available-for-sale	1,230,134	702,616	1,338,910
Loans receivable	76,832	188,407	473,961
Loans held for sale originated for investment	338,046	611,291	367,404
Other real estate owned	100,547	177,015	140,710
Premises and equipment	18,914	9,227	112
Investments in affordable housing partnerships		7,100	2,000
Other investments		2,454
Repayments, maturities and redemptions of investment securities available-for-sale	1,119,098	1,780,457	2,564,157
Paydowns, maturities and termination of securities purchased under resale agreements	736,434	1,005,632	680,000
Redemption of Federal Home Loan Bank stock	29,622	25,908	20,075
Other net investing activities	(491)	(227)	(10,500)
Net cash (used in) provided by investing activities	(758,905)	(1,071,226)	93,233
Net increase (decrease) in:
Deposits	856,352	1,812,375	254,985
Short-term borrowings	(5,208)	(63,337)	40,095
Proceeds from:
FHLB advances			550,000
Issuance of common stock pursuant to various stock plans and agreements	3,821	5,726	4,454
Payment for:
Repayment of FHLB advances	(100,857)	(760,274)	(1,198,312)
Modification of Federal Home Loan Bank advances	(48,190)
Repayment of long-term debt	(75,000)	(23,918)
Repayment of other borrowings		(11,250)	(43,365)
Repurchase of Series B preferred stock			(306,546)
Repurchase of common stock warrants		(14,500)
Repurchase of shares of treasury stock pursuant to the Stock Repurchase Plan	(199,950)
Cash dividends	(64,218)	(30,679)	(29,605)
Other net financing activities	(2,550)	68	(1,377)
Net cash provided by (used in) financing activities	364,200	914,211	(729,671)
Effect of exchange rate changes on cash and cash equivalents	(900)	(1,066)	2,107
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(108,079)	97,236	234,865
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	1,431,185	1,333,949	1,099,084
CASH AND CASH EQUIVALENTS, END OF YEAR	1,323,106	1,431,185	1,333,949
Cash paid during the year for:
Interest	136,760	175,772	206,706
Income tax payments, net of refunds	183,398	326,725	(60,621)
Noncash investing and financing activities:
Transfers to other real estate owned	81,605	175,551	270,995
Conversion of preferred stock to common stock		31	325,299
Loans to facilitate sales of other real estate owned and short sale	6,380	8,882	15,888
Loans to facilitate sales of loans	1,018	27,149	45,522
Loans to facilitate sale of premises and equipment		11,100
Loans transferred to loans held for sale, net	144,131	644,915	563,974
Issuance of common stock in lieu of Board of Directors retainer fees	570	520	281
Amortization of preferred stock discount			$ 21,042