CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 179,028	$ 108,215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	48,823	48,153
(Accretion) of discount and amortization of premiums, net	(162,319)	(159,226)
Decrease in FDIC indemnification asset and receivable	79,700	47,170
Gain on acquisition	0	(27,571)
Stock compensation costs	9,850	6,164
Deferred tax expense	64,398	32,355
Provision for loan losses	75,006	170,325
Impairment on other real estate owned	22,440	36,508
Net gain on sales of investment securities, loans and other assets	(29,586)	(39,260)
Originations and purchases of loans held for sale	(40,193)	(22,013)
Proceeds from sales of loans held for sale	30,180	20,389
Prepayment penalty for Federal Home Loan Bank advances and other borrowings	12,281	13,832
Net proceeds from FDIC shared-loss agreements	147,121	249,175
Net change in accrued interest receivable and other assets	(134,500)	29,211
Net change in accrued expenses and other liabilities	(100,393)	162,446
Other net operating activities	(2,383)	10,833
Total adjustments	20,425	578,491
Net cash provided by operating activities	199,453	686,706
CASH FLOWS FROM INVESTING ACTIVITIES
Net cash acquired in WFIB acquisition	0	67,186
Net (increase) decrease in loans	(720,348)	662,655
Net decrease in short-term investments	77,551	95,288
Net increase in federal funds sold	(30,000)	(75,000)
Purchases of:
Securities purchased under resale agreements	(1,119,711)	(750,000)
Investment securities available-for-sale	(2,464,002)	(3,612,331)
Loans receivable	(569,946)	(580,396)
Federal Reserve Bank stock	(99)	(10,500)
Premises and equipment	(7,460)	(90,051)
Investments in affordable housing partnerships	(22,756)	(37,773)
Proceeds from sale of:
Investment securities available-for-sale	602,625	1,047,173
Loans receivable	151,961	427,087
Loans held for sale originated for investment	607,291	147,194
Other real estate owned	135,461	77,804
Premises and equipment	9,200	84
Repayments, maturities and redemptions of investment securities available-for-sale	1,447,842	2,268,589
Paydowns, maturities and termination of securities purchased under resale agreements	667,887	630,000
Redemption of Federal Home Loan Bank stock	19,424	13,427
Net cash (used in) provided by investing activities	(1,215,080)	280,436
Net increase (decrease) in:
Deposits	1,668,073	(87,053)
Short-term borrowings	(58,596)	2,214
Proceeds from:
FHLB advances	0	350,000
Issuance of common stock pursuant to various stock plans and agreements	3,663	2,527
Payment for:
Repayment of FHLB advances	(760,274)	(1,198,312)
Repayment of long-term debt	(21,918)	(24,825)
Repayment of notes payable and other borrowings	(6,250)	0
Repurchase of common stock warrants	(14,500)	0
Cash dividends	(21,512)	(20,704)
Other net financing activities	(73)	(637)
Net cash provided by (used in) financing activities	788,613	(976,790)
Effect of exchange rate changes on cash and cash equivalents	(1,047)	500
NET INCREASE IN CASH AND CASH EQUIVALENTS	(228,061)	(9,148)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1,333,949	1,099,084
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,105,888	1,089,936
Cash paid during the period for:
Interest	135,037	159,742
Income tax payments, net of refunds	262,988	24,292
Noncash investing and financing activities:
Transfers to other real estate owned/affordable housing investments	140,987	203,276
Conversion of preferred stock to common stock	31	325,299
Loans to facilitate sales of other real estate owned	8,792	13,550
Loans to facilitate sales of loans	21,637	42,022
Loans to facilitate sales of premises and equipment	11,100	0
Loans transferred to loans held for sale	$ 631,407	$ 138,792