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Supplemental Information on Oil and Natural Gas Producing Activities (Unaudited) - Narrative (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2016 MBoe | Oct. 01, 2016 MBoe | Dec. 31, 2018 MBoe | Dec. 31, 2017 MBoe | Dec. 31, 2016 MBoe well | Dec. 31, 2015 MBoe
Reserve Quantities [Line Items] |  |  |  |  |  |
Percentage of proved reserves estimates prepared by external engineers |  |  | 0.90 |  |  |
Proved developed and undeveloped reserves (MBoe) |  |  | 160,200 | 177,600 |  |
Revision of previous estimates (MBoe) |  |  | (24,900) | 10,900 | (105,400) |
Revision of previous estimates due to changes in well performance (MBoe) |  |  | (8,300) |  | (94,700) |
Proved Developed and Undeveloped Reserves, Sale of Mineral in Place (Energy) |  |  | 6,600 | 1,900 | 24,600 |
Acquisitions of new reserves (MBoe) |  |  | 15,400 |  |  |
Upward revision of estimates due to extensions (MBoe) |  |  | 19,300 | 19,400 | 7,800 |
Revision of previous estimates due to changes in commodity pricing (MBoe) |  |  |  |  | (12,100) |
Decrease in reserves due to changes in accounting |  |  |  |  | (19,100) |
Natural Gas and LNG |  |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |  |
Percent share of downward revision |  |  |  |  | (85.00%) |
Oil |  |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |  |
Percent share of downward revision |  |  |  |  | (15.00%) |
Mid-Continent |  |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |  |
Minimum number of wells in areas with decline in production | well |  |  |  |  | 3 |
Number of years wells in production seeing decline in production |  |  |  |  | 2 years |
Successor |  |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |  |
Proved developed and undeveloped reserves (MBoe) | 163,955 |  | 160,176 | 177,594 | 163,955 |
Revision of previous estimates (MBoe) | 25,270 |  | (33,188) | 10,879 |  |
Proved Developed and Undeveloped Reserves, Sale of Mineral in Place (Energy) |  |  | 6,577 | 1,909 |  |
Acquisitions of new reserves (MBoe) |  |  | 15,350 | 202 |  |
Upward revision of estimates due to extensions (MBoe) | 5,034 |  | 19,332 | 19,373 |  |
Predecessor |  |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |  |
Proved developed and undeveloped reserves (MBoe) |  | 137,992 |  |  |  | 324,626
Revision of previous estimates (MBoe) |  | (130,709) |  |  |  |
Proved Developed and Undeveloped Reserves, Sale of Mineral in Place (Energy) |  | 24,598 |  |  |  |
Upward revision of estimates due to extensions (MBoe) |  | 2,785 |  |  |  |

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