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Derivatives (Details Textual)
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6 Months Ended | 12 Months Ended |
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Jun. 30, 2013
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Dec. 31, 2012
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| Derivatives [Abstract] | ||
| Expected dividend yield |
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- Details
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- Definition
Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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