CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 138,640	$ 116,596
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	39,711	30,708
(Accretion) of discount and amortization of premiums, net	(96,885)	(101,894)
Decrease in FDIC indemnification asset and receivable	45,763	36,249
Stock compensation costs	7,773	5,570
Deferred tax (benefit) expense	(19,868)	63,616
Provision for loan losses	33,600	53,006
Impairment on other real estate owned	10,541	19,655
Net gain on sales of investment securities, loans and other assets	(14,854)	(19,518)
Originations and purchases of loans held for sale	(34,716)	(6,884)
Proceeds from sales of loans held for sale		8,081
Prepayment penalty for Federal Home Loan Bank advances, net	3,657	8,455
Prepayment penalty on modification of Federal Home Loan Bank advances	(37,678)
Net proceeds from FDIC shared-loss agreements	63,077	101,102
Net change in accrued interest receivable and other assets	(67,820)	(129,150)
Net change in accrued expenses and other liabilities	(43,142)	156,015
Other net operating activities	(2,007)	(1,653)
Total adjustments	(112,848)	223,358
Net cash provided by operating activities	25,792	339,954
Net (increase) decrease in:
Loans	184,443	(396,027)
Short-term investments	(192,880)	58,081
Federal funds sold	(30,000)
Purchases of:
Securities purchased under resale agreements	(25,000)	(418,369)
Investment securities available-for-sale	(482,500)	(1,385,644)
Loans receivable	(239,272)	(463,981)
Premises and equipment	(3,405)	(2,199)
Investments in affordable housing partnerships	(34,128)	(17,444)
Proceeds from sale of:
Investment securities available-for-sale	1,097,270	527,823
Loans receivable	58,205	125,288
Loans held for sale originated for investment	199,435	368,478
Other real estate owned	59,814	74,004
Premises and equipment	11	9,111
Repayments, maturities and redemptions of investment securities available-for-sale	606,704	561,711
Paydowns, maturities and termination of securities purchased under resale agreements	136,434	106,088
Redemption of Federal Home Loan Bank stock	12,674	12,903
Other net investing activities	(236)
Net cash provided by (used in) investing activities	1,347,569	(840,177)
Net increase (decrease) in:
Deposits	(110,498)	1,495,126
Short-term borrowings	(25,208)	(5,930)
Proceeds from:
Issuance of common stock pursuant to various stock plans and agreements	2,678	3,341
Payment for:
Repayment of FHLB advances	(57,616)	(683,130)
Repayment of long-term debt		(10,309)
Repayment of notes payable and other borrowings		(6,250)
Repurchase of common stock warrants		(14,500)
Repurchase of shares of treasury stock pursuant to the Stock Repurchase Plan	(149,950)
Cash dividends	(32,642)	(12,352)
Other net financing activities	(1,239)	(98)
Net cash (used in) provided by financing activities	(374,475)	765,898
Effect of exchange rate changes on cash and cash equivalents	(457)	(1,126)
NET INCREASE IN CASH AND CASH EQUIVALENTS	998,429	264,549
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1,431,185	1,333,949
CASH AND CASH EQUIVALENTS, END OF PERIOD	2,429,614	1,598,498
Cash paid during the period for:
Interest	73,938	92,622
Income tax payments, net of refunds	185,729	12,587
Noncash investing and financing activities:
Loans transferred to loans held for sale, net	21,317	479,582
Transfers to other real estate owned	54,478	104,842
Loans to facilitate sales of other real estate owned	850	7,562
Loans to facilitate sales of loans	638	17,416
Loans to facilitate sales of premises and equipment		11,100
Conversion of preferred stock to common stock		$ 31