CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows from Operating Activities:
Net income	$ 362,385	$ 391,185
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan losses	67,708	74,000
Depreciation and amortization	17,642	14,682
(Accretion) amortization of discounts and premiums, net	(987)	3,218
Amortization of core deposit intangibles	20,618	23,593
Net (gain) loss on sale of securities	(35,469)	8
Net gain on sale of loans	(56,131)	(99,582)
Gain on business disposition	(9,823)
Gain on business acquisition		(2,883)
Stock plan-related compensation	12,096	11,884
Loss on OTTI of securities recognized in earnings	18,124	1,971
Changes in assets and liabilities:
Decrease in deferred tax asset, net	51,799	5,649
(Increase) decrease in other assets	(2,985)	33,522
(Decrease) increase in other liabilities	(82,526)	80,567
Origination of loans held for sale	(4,426,713)	(7,021,169)
Proceeds from sale of loans originated for sale	4,705,787	6,082,211
Net cash provided by (used in) operating activities	641,525	(401,144)
Cash Flows from Investing Activities:
Proceeds from repayment of securities held to maturity	1,821,919	3,514,161
Proceeds from repayment of securities available for sale	158,479	813,896
Proceeds from sale of securities held to maturity	284,406
Proceeds from sale of securities available for sale	740,738	660
Purchase of securities held to maturity	(2,609,676)	(3,292,660)
Purchase of securities available for sale	(748,721)
Net redemption of Federal Home Loan Bank stock	3,424	53,144
Net (increase) decrease in loans	(1,191,660)	135,168
Purchase of premises and equipment, net	(29,491)	(9,334)
Net cash acquired in business transactions	100,027	140,895
Net cash (used in) provided by investing activities	(1,470,555)	1,355,930
Cash Flows from Financing Activities:
Net increase (decrease) in deposits	943,596	(479,662)
Net increase in short-term borrowed funds		300,000
Net decrease in long-term borrowed funds	(121,039)	(914,012)
Tax effect of stock plans	2,518	1,533
Cash dividends paid on common stock	(327,657)	(325,612)
Treasury stock purchases	(2,769)	(2,868)
Net cash received from stock option exercises	3,519	4,200
Proceeds from issuance of common stock, net		28,935
Net cash provided by (used in) financing activities	498,168	(1,387,486)
Net decrease in cash and cash equivalents	(330,862)	(432,700)
Cash and cash equivalents at beginning of period	1,927,542	2,670,857
Cash and cash equivalents at end of period	1,596,680	2,238,157
Supplemental information:
Cash paid for interest	513,189	603,369
Cash paid for income taxes	106,480	233,878
Non-cash investing and financing activities:
Transfers to other real estate owned from loans	$ 197,114	$ 51,542