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Assets Held for Sale - Additional Information (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Assets Held for Sale [Abstract] |  |
Oil and gas properties | $ 191,384 |
Less: accumulated depreciation, depletion, amortization and impairment | (54,318) |
Total assets | 137,066 | 0
Asset retirement obligation | 1,973 |
Total liabilities | 1,973 |
Net assets | $ 135,093 |

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- Definition Assets Held-for-Sale, Accumulated Depreciation, Depletion, Amortization and Impairment + References No definition available. + Details
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- Definition Assets Held For Sale, Long Lived, Net of Liabilities + References No definition available. + Details
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- Definition Assets Held-for-Sale, Oil and Gas Properties + References No definition available. + Details
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- Definition Liabilities of Assets Held for Sale, Asset Retirement Obligation + References No definition available. + Details
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- Definition Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 + Details
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- Definition Liability (such as a mortgage) related to a disposal group that is held for sale and anticipated to be sold in less than one year. The liability is expected to be discharged as part of the plan of sale for the asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1436-107760 + Details
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