Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Operating Activities
Net income	$ 39,537	$ 33,902
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	11,867	15,238
Provision for loan losses	16,779	24,203
Deferred taxes	2,183	(1,457)
Gain on sale of securities	(92)	(2,437)
Other-than-temporary impairment losses on securities		2,288
Tax expense of stock-based compensation	62	205
Net change in:
Interest receivable	1,312	866
Interest payable	(620)	(923)
Trading securities	110,490
Residential mortgage loans held for sale	2,778	5,522
Bank owned life insurance	(638)	(1,624)
Other, net	17,588	4,735
Net cash flows provided by operating activities	201,246	80,518
Investing Activities
Net change in loans	(226,196)	(145,861)
Securities available for sale:
Purchases	(138,672)	(261,012)
Sales	10,883	59,455
Maturities	162,150	163,233
Securities held to maturity:
Purchases	(299,545)	(195,733)
Maturities	117,207	116,277
Purchase of bank owned life insurance	(26)	(22)
Increase in premises and equipment	(6,843)	(3,393)
Net cash received in business combinations	23,375
Net cash flows used in investing activities	(357,667)	(267,056)
Financing Activities
Non-interest bearing deposits, savings and NOW accounts	288,317	144,500
Time deposits	(79,887)	9,936
Short-term borrowings	(50,414)	66,275
Increase in long-term debt	37,592	64,795
Decrease in long-term debt	(17,864)	(183,838)
Decrease in junior subordinated debt	(95)	(338)
Net proceeds from issuance of common stock	66,148	3,314
Tax expense of stock-based compensation	(62)	(205)
Cash dividends paid	(29,752)	(27,584)
Net cash flows provided by financing activities	213,983	76,855
Net Increase in Cash and Cash Equivalents	57,562	(109,683)
Cash and cash equivalents at beginning of period	131,571	310,550
Cash and Cash Equivalents at End of Period	$ 189,133	$ 200,867

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Non-interest bearing deposits, savings and Negotiable Order of Withdrawal accounts.

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The component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from share-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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The net gain or loss realized from the sale, exchange, redemption, or retirement of securities.

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This element represents the amount by which the carrying amount exceeds the fair value of the investment. The amount is charged to income if the decline in fair value is deemed to be other than temporary.

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The net change during the reporting period in the amount due from borrowers for interest payments.

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The net change during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.

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The net change during the reporting period in the value of loans or securitized loans that are held with the intention to sell in the near future.

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For entities with classified balance sheets, the net change during the reporting period in the value of other assets or liabilities used in operating activities, that are not otherwise defined in the taxonomy. For entities with unclassified balance sheets, the net change during the reporting period in the value of all other assets or liabilities used in operating activities.

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Net cash inflow (outflow) in the total of all time deposits and shall be classified as cash flows from financing activities.

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The net change during the reporting period in the aggregate market value of equity or debt securities that are purchased and held principally for the purpose of selling them in the near future and benefiting from increases in prices.

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The net cash inflow (outflow) from financing activity for the period.

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The net cash inflow (outflow) from investing activity.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income.

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The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

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The net cash inflow (outflow) for the net change in the beginning and end of period of loan and lease balances which are not originated or purchased specifically for resale.

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The cash outflow from the entity's earnings to the shareholders.

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The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The cash outflow to acquire a debt financial instrument for which the entity has the ability and intent to hold until maturity.

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The cash outflow for payments to purchase life insurance policies for which the entity is the beneficiary.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow from the additional capital contribution to the entity.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The cash inflow associated maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

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The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity.

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The net cash inflow (outflow) for borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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The cash inflow from issuance of trust preferred securities, net of the cash outflow for repurchasing trust preferred securities, by a business trust or other special purpose entity, mainly established by a bank holding entity, to third party investors. The trust's assets are deeply subordinated debentures of the bank holding entity. Most trust preferred securities are subject to a mandatory redemption upon the repayment of the debentures.

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- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 16
-Subparagraph a

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 18

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 15

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 16
-Subparagraph b

+ Details

Name:	us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The sum of the periodic provision charged to operations, based on an assessment of the uncollectibility of the loan and lease portfolio, the offset to which is either added to or deducted from the allowance account for the purpose of reducing loan receivable and leases to an amount that approximates their net realizable value (the amount expected to be collected).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Chapter 5
-Paragraph 168, 169, 170
-IssueDate 2006-05-01

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 9

+ Details

Name:	us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration