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Summary of Significant Accounting Policies 3 (Details)
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12 Months Ended |
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Dec. 31, 2012
Form
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| Useful Lifes Related To Intangible Assets and Property [Abstract] | |
| Period used for recovery analysis of long-lived assets to be held and used that may be impaired (in years) | 10 years |
| Share-Based Compensation | |
| Number of forms of share based compensation plans | 2 |
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Market concentration premium
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| Useful Lifes Related To Intangible Assets and Property [Abstract] | |
| Finite-Lived Intangible Asset, Useful Life | 40 years |
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- Definition
Number of Different Forms of Share Based Compensation Plans No definition available.
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- Definition
Period used for recovery analysis of long lived assets to be held and used that may be impaired. No definition available.
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- Details
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- Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Details
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