Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 31,281	$ 26,518
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	44,400	49,400
Net loss on disposal of property and equipment	28	408
Depreciation and amortization	12,997	15,172
Net premium amortization on investment securities	7,373	4,103
Net gains on investment securities transactions	(56)	(108)
Net gains on sales of mortgage loans held for sale	(8,730)	(9,561)
Net gain on sale of student loan portfolio		(249)
Write-down of OREO, equipment pending disposal and investments	5,972	5,643
Net impairment on mortgage servicing rights	848	2,212
Loss on early extinguishment of debt		306
Deferred income tax expense (benefit)	400	(2,981)
Net increase in cash surrender value of company-owned life insurance policies	(1,306)	(1,493)
Stock-based compensation expense	1,648	1,390
Tax benefits from stock-based compensation expense	204	234
Excess tax benefits from stock-based compensation	(129)	(220)
Changes in operating assets and liabilities:
Decrease (increase) in mortgage loans held for sale	799	(10,591)
Increase in interest receivable	(1,366)	(128)
Decrease in other assets	10,840	7,266
Decrease in accrued interest payable	(4,392)	(2,344)
Decrease in accounts payable and accrued expenses	(1,404)	(2,941)
Net cash provided by operating activities	99,407	82,036
Purchases of investment securities:
Held-to-maturity	(11,626)	(19,339)
Available-for-sale	(704,619)	(972,742)
Proceeds from maturities and paydowns of investment securities:
Held-to-maturity	8,940	11,482
Available-for-sale	611,918	606,461
Proceeds from sales of mortgage servicing rights, net of acquisitions	596	597
Proceeds from sale of student loan portfolio		24,829
Extensions of credit to customers, net of repayments	40,278	16,832
Recoveries of loans charged-off	4,269	2,100
Proceeds from sales of OREO	12,247	15,640
Capital expenditures, net of sales	(7,099)	(7,761)
Net cash used in investing activities	(45,096)	(321,901)
Cash flows from financing activities:
Net (decrease) increase in deposits	(74,394)	78,125
Net decrease in repurchase agreements	(144,632)	(18,280)
Net increase in short-term borrowings	131	251
Repayments of long-term debt	(33)	(35,840)
Common stock issuance costs		(13,733)
Proceeds from issuance of common stock	272	167,400
Excess tax benefits from stock-based compensation	129	220
Purchase and retirement of common stock	(197)	(3,699)
Dividends paid to common stockholders	(14,419)	(13,147)
Dividends paid to preferred stockholders	(2,559)	(2,559)
Net cash (used in) provided by financing activities	(235,702)	158,738
Net decrease in cash and cash equivalents	(181,391)	(81,127)
Cash and cash equivalents at beginning of period	685,618	623,482
Cash and cash equivalents at end of period	504,227	542,355
Supplemental disclosures of cash flow information:
Cash paid during the period for income taxes	12,420	15,300
Cash paid during the period for interest expense	$ 37,452	$ 52,086