CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 209,750	$ 179,028
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	58,978	48,823
(Accretion) of discount and amortization of premiums, net	(152,297)	(162,319)
Decrease in FDIC indemnification asset and receivable	72,520	79,700
Stock compensation costs	12,137	9,850
Deferred tax expense	12,131	64,398
Provision for loan losses	52,100	75,006
Impairment on other real estate owned	13,342	22,440
Net gain on sales of investment securities, loans and other assets	(22,654)	(29,586)
Originations and purchases of loans held for sale	(58,237)	(40,193)
Proceeds from sales of loans held for sale		30,180
Prepayment penalty for Federal Home Loan Bank advances and other borrowings, net	3,699	12,281
Prepayment penalty on modification of Federal Home Loan Bank advances	(37,678)
Net proceeds from FDIC shared-loss agreements	83,801	147,121
Net change in accrued interest receivable and other assets	(71,753)	(134,500)
Net change in accrued expenses and other liabilities	(15,983)	(100,393)
Other net operating activities	(3,293)	(2,383)
Total adjustments	(53,187)	20,425
Net cash provided by operating activities	156,563	199,453
Net decrease (increase) in:
Loans	88,965	(720,348)
Short-term investments	(285,167)	77,551
Federal funds sold	(20,000)	(30,000)
Purchases of:
Securities purchased under resale agreements	(750,000)	(1,119,711)
Investment securities available-for-sale	(1,250,317)	(2,464,002)
Loans receivable	(371,352)	(569,946)
Premises and equipment	(5,826)	(7,460)
Investments in affordable housing partnerships	(45,500)	(22,756)
Proceeds from sale of:
Investment securities available-for-sale	1,130,024	602,625
Loans receivable	61,979	151,961
Loans held for sale originated for investment	338,022	607,291
Other real estate owned	76,239	135,461
Premises and equipment	12	9,200
Repayments, maturities and redemptions of investment securities available-for-sale	999,518	1,447,842
Paydowns, maturities and termination of securities purchased under resale agreements	436,434	667,887
Redemption of Federal Home Loan Bank stock	18,943	19,424
Other net investing activities	(360)	(99)
Net cash provided by (used in) investing activities	421,614	(1,215,080)
Net increase (decrease) in:
Deposits	213,425	1,668,073
Short-term borrowings	(25,208)	(58,596)
Proceeds from:
Issuance of common stock pursuant to various stock plans and agreements	3,136	3,663
Payment for:
Repayment of FHLB advances	(57,615)	(760,274)
Repayment of long-term debt	(75,000)	(21,918)
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	(199,950)
Cash dividends	(48,472)	(21,512)
Other net financing activities	(2,406)	(73)
Net cash (used in) provided by financing activities	(192,090)	788,613
Effect of exchange rate changes on cash and cash equivalents	(900)	(1,047)
NET INCREASE IN CASH AND CASH EQUIVALENTS	385,187	(228,061)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1,431,185	1,333,949
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,816,372	1,105,888
Cash paid during the period for:
Interest	104,829	135,037
Income tax payments, net of refunds	188,739	262,988
Noncash investing and financing activities:
Loans transferred to loans held for sale, net	148,755	631,407
Transfers to other real estate owned	62,862	140,987
Loans to facilitate sales of other real estate owned and short sale	3,060	8,792
Loans to facilitate sales of loans	1,018	21,637
Loans to facilitate sales of premises and equipment		11,100
Conversion of preferred stock to common stock		$ 31