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Consolidated Statements of Shareholders' Equity Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Cash dividends per share | $ 0.88 | $ 0.86 | $ 2.24 |
| X | ||||||||||
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- Definition
Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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