Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities:
Net income	$ 81,107	$ 58,354
Adjustments to reconcile net income to net cash (used for) provided by operating activities
Provision for credit losses	56,890	83,821
Depreciation and amortization	17,624	14,128
Stock-based compensation expense	7,260	3,433
Tax benefit from stock-based compensation arrangements	1,279	183
Excess tax benefits from stock-based compensation arrangements	(868)	(760)
Net amortization of premium on securities	4,745	6,308
Mortgage servicing rights fair value change and amortization, net	(3,469)	3,626
Originations and purchases of mortgage loans held-for-sale	(2,688,002)	(1,662,368)
Proceeds from sales of mortgage loans held-for-sale	2,498,525	1,846,396
Bank owned life insurance income, net of claims	(2,234)	(1,888)
Decrease in trading securities, net	1,855	4,582
Net increase in brokerage customer receivables	(2,708)	(3,386)
Gains on mortgage loans sold	(59,984)	(25,617)
Gains on available-for-sale securities, net	(2,334)	(1,483)
Business Combination, Bargain Purchase, Gain Recognized, Amount	(7,418)	(37,974)
Loss on sales of premises and equipment, net	702	10
Decrease in accrued interest receivable and other assets, net	30,377	7,178
Increase (decrease) in accrued interest payable and other liabilities, net	140,857	(2,481)
Net Cash Provided by Operating Activities	74,204	292,062
Investing Activities:
Proceeds from maturities of available-for-sale securities	473,331	1,189,834
Proceeds from sales of available-for-sale securities	2,059,154	605,026
Purchases of available-for-sale securities	(2,079,665)	(2,015,888)
Net cash received for acquisitions	30,220	91,073
Proceeds Received From The FDIC Related To Reimbursements On Covered Assets	152,594	65,038
Net increase in interest-bearing deposits with banks	(113,963)	(211,382)
Net increase in loans	(739,941)	(520,770)
Purchases of premises and equipment, net	(45,533)	(54,769)
Net Cash Used for Investing Activities	(263,803)	(851,838)
Financing Activities:
Increase in deposit accounts	914,513	383,001
(Decrease) increase in other borrowings, net	(118,552)	180,723
Decrease in Federal Home Loan Bank advances, net	(60,000)	0
Repayment of subordinated notes	(20,000)	(10,000)
Payoff of secured borrowing	(600,000)	0
Excess tax benefits from stock-based compensation arrangements	868	760
Net proceeds from issuance of preferred stock	122,690	0
Issuance of common shares resulting from exercise of stock options, employee stock purchase plan and conversion of common stock warrants	12,143	2,846
Common stock repurchases	(7,378)	(68)
Dividends paid	(11,575)	(9,344)
Net Cash Provided by Financing Activities	232,709	547,918
Net Increase (Decrease) in Cash and Cash Equivalents	43,110	(11,858)
Cash and Cash Equivalents at Beginning of Period	169,704	172,580
Cash and Cash Equivalents at End of Period	$ 212,814	$ 160,722