Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Operating Activities:
Net income	$ 28,152	$ 29,027
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	54,531	70,342
Depreciation and amortization	9,772	9,060
Stock-based compensation expense	2,034	2,505
Tax benefit from stock-based compensation arrangements	169	562
Excess tax benefits from stock-based compensation arrangements	(238)	(760)
Net amortization of premium on securities	5,496	1,159
Mortgage servicing rights fair value change and amortization, net	1,136	2,242
Originations and purchases of mortgage loans held-for-sale	(1,020,626)	(1,419,144)
Proceeds from sales of mortgage loans held-for-sale	1,257,619	1,480,862
Bank owned life insurance income, net of claims	(1,537)	(1,042)
Decrease (increase) in trading securities, net	4,370	(4,487)
Net increase in brokerage customer receivables	(5,187)	(3,420)
Gain on mortgage loans sold	(4,510)	(23,984)
Gain on available-for-sale securities, net	(1,258)	(438)
Gain on bargain purchases	(10,584)	(37,388)	(33,100)
Loss on sales of premises and equipment, net		8
Decrease in accrued interest receivable and other assets, net	85,641	97,626
Decrease in accrued interest payable and other liabilities, net	(29,341)	(14,350)
Net Cash Provided by Operating Activities	375,639	188,380
Investing Activities:
Proceeds from maturities of available-for-sale securities	746,324	675,419
Proceeds from sales of available-for-sale securities	53,511	270,654
Purchases of available-for-sale securities	(1,072,299)	(1,148,417)
Net cash received for acquisition	19,925	133,952
Net (increase) decrease in interest-bearing deposits with banks	(100,337)	36,909
Net increase in loans	(364,474)	(421,140)
Purchases of premises and equipment, net	(48,741)	(5,067)
Net Cash Used for Investing Activities	(766,091)	(457,690)
Financing Activities:
Increase in deposit accounts	243,605	137,276
Increase (decrease) in other borrowings, net	171,673	(29,013)
Decrease in Federal Home Loan Bank advances, net		(43,069)
Repayment of subordinated note	(10,000)	(5,000)
Excess tax benefits from stock-based compensation arrangements	238	760
Issuance of common stock, net of issuance costs		210,417
Issuance of common shares resulting from exercise of stock options, employee stock purchase plan and conversion of common stock warrants	1,619	2,242
Common stock repurchases	(50)	(102)
Dividends paid	(5,145)	(10,441)
Net Cash Provided by Financing Activities	401,940	263,070
Net Increase (Decrease) in Cash and Cash Equivalents	11,488	(6,240)
Cash and Cash Equivalents at Beginning of Period	172,580	158,616	158,616
Cash and Cash Equivalents at End of Period	$ 184,068	$ 152,376	$ 172,580