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Asset Retirement Obligations - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2013 Well | Dec. 31, 2012 | Dec. 31, 2011
Asset Retirement Obligations (Textual) [Abstract] |  |  |
Number of wells | 2 |  |
Revisions | $ 0 | $ (5,744,000) | $ (7,000)
Abandoned Period Of Material Assets | P5Y |  |
Abandonment cost related to annual funding | $ 10,100,000 |  |

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- Definition Abandonment cost related to annual funding. + References No definition available. + Details
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- Details
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- Definition Number of wells. + References No definition available. + Details
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- Definition Amount of the Increase or Decrease in the amount of the asset retirement obligation during the current period for changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition The timing in which the entity expects to abandon the long-lived asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 47 -URI http://asc.fasb.org/extlink&oid=29634951&loc=d3e1794-110224 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 48 -URI http://asc.fasb.org/extlink&oid=29634951&loc=d3e1816-110224 + Details
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