Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows From Operating Activities:
Net income	$ 182,654	$ 136,461
Adjustments to reconcile net income before non-controlling interest to net cash provided by operating activities:
Provision for credit losses	(8,000)	8,950
Change in fair value of mortgage servicing rights	4,323	10,364
Unrealized gains from derivatives	(7,626)	5,834
Tax benefit on exercise of stock options	677	(339)
Change in bank-owned life insurance	(5,709)	(5,735)
Stock-based compensation	4,803	4,803
Depreciation and amortization	24,636	24,529
Net amortization of securities discounts and premiums	47,789	48,751
Net realized gains on financial instruments and other assets	(60,122)	(16,789)
Mortgage loans originated for resale	(1,588,200)	(902,774)
Proceeds from sale of mortgage loans held for resale	1,569,921	1,013,516
Capitalized mortgage servicing rights	(17,647)	(10,767)
Change in trading and fair value option securities	251,682	(169,581)
Change in receivables	(9,667)	18,996
Change in other assets	2,838	17,073
Change in accrued interest, taxes and expense	(9,074)	(29,614)
Change in other liabilities	7,888	(35,125)
Net cash provided by operating activities	391,166	118,553
Cash Flows From Investing Activities:
Proceeds from maturities of investment securities	43,678	26,986
Proceeds from maturities of available for sale securities	2,486,198	1,216,168
Purchases of investment securities	(16,971)	(37,085)
Purchases of available for sale securities	(4,162,486)	(2,967,565)
Proceeds from sales of available for sale securities	1,451,551	1,447,073
Change in amount receivable on unsettled securities transactions	42,275	(35,541)
Loans originated net of principal collected	(327,349)	(87,541)
Net payments on derivative asset contracts	(119,495)	55,877
Proceeds from disposition of assets	101,550	62,060
Purchases of assets	(40,991)	(19,984)
Net cash used in investing activities	(542,040)	(339,552)
Cash Flows From Financing Activities:
Net change in demand deposits, transaction deposits and savings accounts	(126,351)	281,284
Net change in time deposits	(274,032)	125,692
Net change in other borrowings	229,401	(214,296)
Early Repayment of Subordinated Debt	(46,882)	0
Net payments or proceeds on derivative liability contracts	110,249	(58,891)
Net change in derivative margin accounts	21,749	(46,606)
Change in amount due on unsettled security transactions	(49,571)	6,182
Issuance of common and treasury stock, net	8,454	4,291
Tax benefit on exercise of stock options	(677)	339
Repurchase of common stock	(20,558)	0
Dividends paid	(48,010)	(35,639)
Net cash provided by financing activities	(196,228)	62,356
Net increase (decrease) in cash and cash equivalents	(347,102)	(158,643)
Cash and cash equivalents at beginning of period	986,365	1,269,404
Cash and cash equivalents at end of period	639,263	1,110,761
Cash paid for interest	48,536	63,563
Cash paid for taxes	81,738	87,888
Net loans and bank premises transferred to repossessed real estate and other assets	55,821	33,894
Increase in U.S. government guaranteed loans eligible for repurchase	48,486	59,697
Increase in receivables from conveyance of other real estate owned guaranteed by US govt	$ 34,247	$ 0