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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
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12 Months Ended | |
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Dec. 31, 2011
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Dec. 31, 2010
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| Summary Of Significant Accounting Policies [Line Items] | ||
| Future net revenues, discount rate for ceiling test | 10.00% | |
| Capitalized costs of oil and natural gas properties excluded from amortization | $ 138,623,000 | $ 16,778,000 |
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Maximum [Member]
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| Summary Of Significant Accounting Policies [Line Items] | ||
| Property and equipment useful lives, maximum, years | 30 | |
| Percentage of investments accounted under equity method | 50.00% | |
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Minimum [Member]
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| Summary Of Significant Accounting Policies [Line Items] | ||
| Property and equipment useful lives, minimum, years | 3 | |
| Percentage of investments accounted under equity method | 20.00% |
| X | ||||||||||
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- Definition
Future net revenues, discount rate for ceiling test. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. No definition available.
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| X | ||||||||||
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- Definition
The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. No definition available.
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