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Statements Of Consolidated Changes In Equity (Parenthetical) (USD $)
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12 Months Ended | ||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| CASH DIVIDENDS DECLARED PER SHARE | $ 0.84 | $ 0.51 | $ 0.26 |
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Common Shares [Member]
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| CASH DIVIDENDS DECLARED PER SHARE | $ 0.84 | $ 0.51 | $ 0.26 |
| 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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