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Gains (Losses) on Equity Investments, Net (Tables)
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3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2012
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| Gains (Losses) on Equity Investments, Net (Tables) [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Gains (Losses) On Equity Investments, Net [Table Text Block] | Gains (losses) on equity investments, net included:
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