CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 68,083	$ 56,071
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,459	15,429
(Accretion) of discount and amortization of premiums, net	(34,660)	(45,236)
Decrease in FDIC indemnification asset and receivable	5,418	17,443
Stock compensation costs	3,637	2,287
Deferred tax (benefit) expense	(20,159)	26,901
Provision for loan losses	18,100	26,506
Impairment on other real estate owned	7,389	7,816
Net gain on sales of investment securities, loans and other assets	(7,014)	(9,070)
Originations and purchases of loans held for sale	(15,782)	(6,150)
Proceeds from sales of loans held for sale		7,235
Prepayment penalty for Federal Home Loan Bank advances, net	1,321	4,022
Prepayment penalty on modification of Federal Home Loan Bank advances	(37,678)
Net proceeds from FDIC shared-loss agreements	39,358	44,399
Net change in accrued interest receivable and other assets	(27,165)	26,138
Net change in accrued expenses and other liabilities	40,427	(15,143)
Other net operating activities	(713)	(338)
Total adjustments	(8,062)	102,239
Net cash provided by operating activities	60,021	158,310
Net (increase) decrease in:
Loans	68,532	(8,348)
Short-term investments	(115,742)	2,975
Federal funds sold	(30,000)
Purchases of:
Securities purchased under resale agreements		(268,369)
Investment securities available-for-sale	(8,018)	(590,045)
Loans receivable	(116,486)	(297,690)
Investments in affordable housing partnerships	(17,850)	(8,828)
Proceeds from sale of:
Investment securities available-for-sale	260,261	312,870
Loans receivable	27,639	92,840
Loans held for sale originated for investment	52,559	143,244
Other real estate owned	22,791	33,612
Repayments, maturities and redemptions of investment securities available-for-sale	138,650	228,320
Paydowns, maturities and termination of securities purchased under resale agreements	136,434
Redemption of Federal Home Loan Bank stock	6,391	6,330
Other net investing activities	(832)	(982)
Net cash provided by (used in) investing activities	424,329	(354,071)
Net increase (decrease) in:
Deposits	(113,801)	795,971
Short-term borrowings	(25,208)	(2,526)
Proceeds from:
Issuance of common stock pursuant to various stock plans and agreements	1,539	1,575
Payment for:
Repayment of FHLB advances	(23,003)	(420,887)
Repurchase of common stock warrants		(14,500)
Repurchase of shares of treasury stock pursuant to the Stock Repurchase Plan	(100,978)
Cash dividends	(16,495)	(3,201)
Other net financing activities	(1,284)	(505)
Net cash (used in) provided by financing activities	(279,230)	355,927
Effect of exchange rate changes on cash and cash equivalents	(451)	(1,193)
NET INCREASE IN CASH AND CASH EQUIVALENTS	204,669	158,973
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1,431,185	1,333,949
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,635,854	1,492,922
Cash paid during the period for:
Interest	34,140	46,347
Income tax payments, net of refunds	23,422	3,282
Noncash investing and financing activities:
Loans transferred to loans held for sale	40,800	243,119
Transfers to other real estate owned	39,572	68,534
Loans to facilitate sales of other real estate owned	400	7,562
Loans to facilitate sales of loans		13,154
Conversion of preferred stock to common stock		$ 31