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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements Of Changes In Shareholders' Equity [Abstract]
Options exercised, shares	145,618	105,944
Conversion of common stock units, shares	4,266	15,715
Conversion of restricted stock units, shares	48,167	6,818
Cash dividends, per share	$ 0.13	$ 0.11
Treasury stock, beginning balance, shares	22,028,030	21,813,196
Treasury stock, acquisition of shares	200,120	0
Treasury stock, ending balance, shares	22,228,150	21,813,196

X

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Shares of stock issued during the period as a result of the conversion of common stock units which represented deferred compensation of directors and/or employees.

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Shares of stock issued during the period as a result of the conversion of restricted stock units which represented share based compensation.

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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



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Number of share options (or share units) exercised during the current period.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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