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Impairment of Proved and Unproved Properties (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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| Impaired Long-Lived Assets Held and Used [Line Items] | ||||
| Impairment of proved properties | $ 0 | $ 48,525 | $ 38,523 | $ 48,525 |
| Abandonment and impairment of unproved properties | $ 447 | $ 0 | $ 11,296 | $ 4,316 |
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- Details
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- Definition
The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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