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Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income (Loss) (Details) (USD $)
In Thousands

6 Months Ended

12 Months Ended

Jun. 30, 2011

Jun. 30, 2010

Dec. 31, 2010

Unrealized gains on investment securities available for sale

$ 33,481

$ 44,127

$ 34,618

Deferred tax expense (benefit), Total

(17,133)

(34,105)

Accumulated other comprehensive income (loss), net of tax

(29,451)

^[1]

(22,557)

^[1]

(36,529)

^[2]

Accumulated Other Comprehensive Income (Loss) [Member]

Unrealized gains on investment securities available for sale

31,839

43,998

23,195

Funded status of defined benefit plan

(70,400)

(70,892)

(73,696)

Unrealized loss on cash flow hedge

(9,800)

(11,309)

(9,492)

Accumulated other comprehensive income (loss), Total

(48,361)

(38,203)

(59,993)

Deferred Tax Expense (Benefit) [Member]

Unrealized gains on investment securities available for sale

12,528

16,580

9,143

Funded status of defined benefit plan

(27,568)

(27,761)

(28,859)

Unrealized loss on cash flow hedge

(3,870)

(4,466)

(3,748)

Deferred tax expense (benefit), Total

(18,910)

(15,647)

(23,464)

Accumulated Other Comprehensive Income (Loss) Net Of Tax [Member]

Unrealized gains on investment securities available for sale

19,311

27,418

14,052

Funded status of defined benefit plan

(42,832)

(43,131)

(44,837)

Unrealized loss on cash flow hedge

(5,930)

(6,844)

(5,744)

Accumulated other comprehensive income (loss), net of tax

$ (29,451)

$ (22,557)

$ (36,529)

[1]	Unaudited
[2]	Derived from the 2010 Annual Report on Form 10-K.

X

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, before tax effect. Excludes Net Income or Loss, and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency items, minimum pension liability adjustments, and unrealized gains and losses on certain investments in debt and equity securities as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ Details

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X

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at fiscal year-end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, and unrealized gains and losses on certain investments in debt and equity securities as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14, 17, 26

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 31
-Article 5

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X

- Definition

This item represents the gross unrealized gains for securities which are categorized neither as held-to-maturity nor trading securities. Such gross unrealized gains are the excess of the fair value of the Available-for-sale Securities over their carrying value as of the reporting date. Such gross unrealized gains are included in other comprehensive income in the statement of shareholders' equity, unless the Available-for-sale Security is designated as a hedge. All or a portion of the unrealized holding gain of an available-for-sale security that is designated as being hedged in a fair value hedge shall be recognized in earnings during the period of the hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 22

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 13, 19

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X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section I
-Subsection 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 45
-Subparagraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 289

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

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Balance Type:	debit
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X

- Definition

The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph c

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X

- Definition

Amount of unrealized gain (loss) related to derivatives designated as cash flow hedging instruments, recorded in results of operations to the extent that the cash flow hedge is determined to be ineffective.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-Subparagraph b(1)

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