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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements Of Changes In Shareholders' Equity
Common stock, par value	$ 0.001	$ 0.001
Options exercised, shares	136,290	6,200
Conversion of common stock units, shares	15,715	160,876
Conversion of restricted stock units, shares	170,876	46,576
Cash dividends, per share	$ 0.22	$ 0.16
Treasury stock, beginning balance, shares	21,813,196	21,813,196
Treasury stock, acquisition of shares	60,126	0
Treasury stock, ending balance, shares	21,873,322	21,813,196

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

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Face amount or stated value of common stock per share; generally not indicative of the fair market value per share.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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Number of share options (or share units) exercised during the current period.

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