Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities:
Net income	$ 32,052	$ 23,210
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	15,687	17,400
Depreciation and amortization	6,782	5,627
Stock-based compensation expense	2,413	2,289
Tax benefit from stock-based compensation arrangements	(200)	(12)
Excess tax benefits from stock-based compensation arrangements	(222)	(643)
Net amortization (accretion) of premium on securities	3,424	(2,092)
Mortgage servicing rights fair value change and amortization, net	(273)	(514)
Originations and purchases of mortgage loans held-for-sale	(974,432)	(714,655)
Proceeds from sales of mortgage loans held-for-sale	1,033,129	699,315
Bank owned life insurance income, net of claims	(846)	(919)
(Increase) decrease in trading securities, net	(453)	1,350
Net increase in brokerage customer receivables	(750)	(3,160)
Gains on mortgage loans sold	(27,419)	(14,464)
Gains on available-for-sale securities, net	(251)	(816)
Gain on bargain purchases, net	0	(840)
Loss on sales of premises and equipment, net	1	12
Net (gain) loss on sales and fair value adjustments of other real estate owned	2,658	(5,496)
Decrease in accrued interest receivable and other assets, net	(32,914)	(10,040)
Decrease in accrued interest payable and other liabilities, net	(19,617)	(11,689)
Net Cash Provided by Operating Activities	99,681	14,959
Investing Activities:
Proceeds from maturities of available-for-sale securities	67,941	280,110
Proceeds from sales of available-for-sale securities	41,056	737,369
Purchases of available-for-sale securities	(192,379)	(952,853)
Net cash received for acquisitions	0	8,191
Divestiture of operations	(149,100)	0
Proceeds from sales of other real estate owned	30,641	25,768
Proceeds received from the FDIC related to reimbursements on covered assets	13,932	82,278
Net decrease (increase) in interest-bearing deposits with banks	350,441	(151,033)
Net increase in loans	(52,143)	(221,051)
Purchases of premises and equipment, net	(6,508)	(8,501)
Net Cash Provided by (Used for) Investing Activities	103,881	(199,722)
Financing Activities:
(Decrease) increase in deposit accounts	(314,618)	269,326
Increase (decrease) in other borrowings, net	11,576	(34,141)
Decrease in Federal Home Loan Bank advances, net	0	(8,000)
Excess tax benefits from stock-based compensation arrangements	222	643
Debt defeasance	0	(172,848)
Net proceeds from issuance of Series C preferred stock	0	122,690
Issuance of common shares resulting from exercise of stock options, employee stock purchase plan and conversion of common stock warrants	1,354	8,699
Common stock repurchases	(349)	(6,447)
Dividends paid	(3,574)	(4,261)
Net Cash (Used for) Provided by Financing Activities	(305,389)	175,661
Net Decrease in Cash and Cash Equivalents	(101,827)	(9,102)
Cash and Cash Equivalents at Beginning of Period	315,028	169,704
Cash and Cash Equivalents at End of Period	$ 213,201	$ 160,602