Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 42,633	$ 22,853
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for loan losses	0	31,000
Depreciation and amortization	10,144	8,027
Addition to valuation allowance on mortgage servicing rights, net	(2,371)	180
Amortization of mortgage servicing rights	6,417	5,869
Amortization of other intangible assets	1,049	1,178
Amortization and accretion on earning assets, funding, and other, net	16,149	16,266
Tax benefit from exercise of stock options	5	2
(Gain) loss on sales of investment securities, net and impairment write-downs	(40)	22
Loss on sales of assets, net	481	1,986
Gain on mortgage banking activities, net	(10,477)	(7,858)
Mortgage loans originated and acquired for sale	(563,688)	(290,013)
Proceeds from sales of mortgage loans held for sale	620,895	403,707
Decrease in interest receivable	2,744	295
Decrease in interest payable	(9,574)	(5,368)
Net change in other assets and other liabilities	(2,602)	10,065
Net cash provided by operating activities	111,765	198,211
CASH FLOWS FROM INVESTING ACTIVITIES
Net (increase) decrease in loans	(251,508)	(158,263)
Purchases of:
Investment securities	(266,436)	(255,023)
Premises, equipment, and software, net of disposals	(12,149)	(7,156)
Other assets	(407)	(755)
Proceeds from:
Sales of investment securities	92,716	2,114
Calls and maturities of investment securities	439,014	483,436
Sales of other assets	9,204	9,435
Net cash provided by (used in) investing activities	10,434	73,788
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in deposits	562,721	(1,201,750)
Net increase (decrease) in short-term funding	(578,266)	800,423
Repayment of long-term funding	(125)	(228,013)
Proceeds from issuance of long-term funding	0	297,240
Proceeds from issuance of common stock	0	0
Proceeds from issuance of preferred stock	0	0
Redemption of preferred stock	0	0
Cash dividends on common stock	(8,735)	(1,742)
Cash dividends on preferred stock	(1,300)	(6,563)
Purchase of treasury stock	(1,113)	(607)
Net cash used in financing activities	(26,818)	(341,012)
Net increase(decrease) in cash and cash equivalents	95,381	(69,013)
Cash and cash equivalents at beginning of period	616,595	868,162
Cash and cash equivalents at end of period	711,976	799,149
Supplemental disclosures of cash flow information:
Cash paid for interest	35,461	38,090
Cash (received) paid for income taxes	(10,025)	7
Loans and bank premises transferred to other real estate owned	5,137	14,996
Transfers of loans to held for sale	0	50,904
Capitalized mortgage servicing rights	$ 5,895	$ 4,383