Earnings (loss) per Share (Details Textual)
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3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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Earnings (Loss) Per Share (Textual) [Abstract] | ||||
Basic and diluted weighted average number of common shares outstanding | 881,717,879 | 861,505,671 | 877,280,730 | 855,810,167 |