Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Retained earnings
Dividends paid on common stock (per share)	$ 0.23	$ 0.30
Accumulated other comprehensive income (loss)
Tax expense related to unrealized gains on securities available for sale	$ 415	$ 56,577
Tax expense related to reclassification adjustment for gains	40,526	25,079
Tax expense related to pension and other postretirement benefits adjustment	$ 795	$ 359

Tax expense to reclassification adjustment for gains.

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

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

+ Details

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- Definition

Tax effects of the net changes to accumulated comprehensive income during the period related to benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 25

+ Details

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- Definition

Tax effect on gross appreciation or the gross loss in value of the total of unsold securities during the period being reported on.

+ References

+ Details

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