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Supplemental Information on Oil and Natural Gas Producing Activities - Summary of Changes in Estimated Oil and Natural Gas Reserves - Noncontrolling Interests (Unaudited) (Additional Information) (Details) Mcf in Thousands | Dec. 31, 2015 MBbls Mcf | Dec. 31, 2014 MBbls Mcf | Dec. 31, 2013 MBbls Mcf | Dec. 31, 2012 MBbls Mcf
--- | --- | --- | --- | ---
Oil Reserves |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Proved reserves (in MBbls for Oil and NGLs/MMcf for Natural Gas) | 77,911 | 126,031 | 142,641 | 262,045
Natural Gas Liquids |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Proved reserves (in MBbls for Oil and NGLs/MMcf for Natural Gas) | 61,075 | 91,786 | 59,052 | 67,994
Natural Gas Reserves |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Proved reserves (in MBbls for Oil and NGLs/MMcf for Natural Gas) | Mcf | 1,113,840 | 1,788,233 | 1,390,429 | 1,415,042
Non-controlling Interest | Oil Reserves |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Proved reserves (in MBbls for Oil and NGLs/MMcf for Natural Gas) | 7,004 | 11,027 | 13,569 |
Non-controlling Interest | Natural Gas Liquids |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Proved reserves (in MBbls for Oil and NGLs/MMcf for Natural Gas) | 3,694 | 4,761 | 4,737 |
Non-controlling Interest | Natural Gas Reserves |  |  |  |
Reserve Quantities [Line Items] |  |  |  |
Proved reserves (in MBbls for Oil and NGLs/MMcf for Natural Gas) | Mcf | 50,508 | 70,833 | 69,693 |

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- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61831-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(a)(2)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 + Details
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