Consolidated Condensed Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating activities:
Net income	$ 62,343	$ 71,530
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, accretion and amortization	6,231	8,457
Provision for loan losses	30,231	43,054
Loan put provision	3,709	0
Other-than-temporary impairment on investment securities	54	0
Amortization of core deposit intangibles	2,033	2,007
Realized net investment security gains	0	(25,462)
OREO devaluations	4,432	6,478
Bank owned life insurance income	(3,570)	(3,686)
Changes in assets and liabilities:
(Increase) in other assets	(2,947)	(31,770)
(Decrease) in other liabilities	(7,295)	6,510
Net cash provided by operating activities	95,221	77,118
Investing activities:
Proceeds from sales of available-for-sale securities	0	535,768
Proceeds from sales of Federal Home Loan Bank stock	1,697	807
Proceeds from maturity of:
Available-for-sale securities	603,943	351,226
Held-to-maturity securities	525,681	281,159
Purchases of:
Available-for-sale securities	(765,636)	(360,835)
Held-to-maturity securities	(258,061)	(429,993)
Net increase in loans	(123,213)	(22,149)
Sale of assets/liabilities related to Vision Bank	(153,724)	0
Purchases of bank owned life insurance	(2,500)	(3,000)
Purchases of premises and equipment, net	(5,850)	(4,765)
Net cash (used in) provided by investing activities	(177,663)	348,218
Financing activities:
Net increase (decrease) in deposits	327,963	(6,233)
Net increase (decrease) in short-term borrowings	12,314	(420,598)
Proceeds from issuance of long-term debt	30,000	203,000
Repayment of long-term debt	(15,514)	(16,011)
Cash payment for fractional shares in dividend reinvestment plan	(2)	(2)
Cash payment for repurchase of common stock warrant from U.S. Treasury	(2,843)	0
Repurchase of preferred stock from U.S. Treasury	(100,000)	0
Cash dividends paid on common stock and preferred stock	(45,667)	(47,175)
Net cash provided by (used in) financing activities	206,251	(287,019)
Increase in cash and cash equivalents	123,809	138,317
Cash and cash equivalents at beginning of year	157,486	133,780
Cash and cash equivalents at end of period	281,295	272,097
Supplemental disclosures of cash flow information:
Cash paid for interest	38,875	45,401
Cash paid for income taxes	7,000	16,700
Non cash activities:
Securities acquired through payable	$ 49,990	$ 21,172