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Supplemental Oil And Gas Disclosures (Standardized Measure Of Discounted Future Net Cash Flows) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Supplemental Oil And Gas Disclosures [Abstract] | |||
| Future cash inflows | $ 7,077,206 | $ 3,953,655 | $ 2,474,260 |
| Production | (1,862,488) | (1,011,552) | (604,794) |
| Development | (543,017) | (243,570) | (212,835) |
| Dismantlement and abandonment | (513,620) | (520,490) | (496,540) |
| Income taxes | (1,126,573) | (495,696) | (186,101) |
| Future net cash inflows before 10% discount | 3,031,508 | 1,682,347 | 973,990 |
| 10% annual discount factor | (1,025,131) | (503,275) | (313,594) |
| Standardized measure of discounted future net cash flows | $ 2,006,377 | $ 1,179,072 | $ 660,396 |
| X | ||||||||||
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- Definition
This is the amount that is derived from using a discount rate of ten percent a year to reflect the timing of the future net cash flows relating to proved oil and gas reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Cash proceeds expected from future sale of oil and gas from proved reserves located in this geographic region. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The future cost of developing oil and gas from proved reserves located in this geographic region. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The estimated future income tax expenses that will be incurred based on the future income less future expenses derived from production and sale of proved oil and gas reserves in this geographic region. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
These amounts are the result of subtracting future development and production costs and future income tax expenses from future cash inflows for each geographic region where proved oil and gas reserves exist. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The future cost of producing oil and gas from proved reserves located in this geographic region. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This amount is the future net cash flows less the computed discount. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Dismantlement And Abandonment Cost No definition available.
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