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Impairment of Proved Properties (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
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Dec. 31, 2012
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Dec. 31, 2011
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| Impairment of Proved Properties (Textual) [Abstract] | ||
| Company recognized an impairment loss | $ 7.6 | $ 5.0 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. No definition available.
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