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Share-based Compensation Stock Option Plan Additional Information (Details)
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6 Months Ended |
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Jun. 30, 2013
optionplans
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of Optin Plans | 2 |
| Percentage of Fair Market Value | 110.00% |
| Share-based Compensation Arrangement by Share-based Payment Award, Award Contractual Term | 10 years |