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Business Segment Information - Summarized Financial Information of Segments (Detail) - USD ($) $ in Thousands | 1 Months Ended | 11 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Nov. 19, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Nov. 18, 2020
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | $ 119,915 | $ 963,419 | $ 2,071,744 | $ 2,321,947 |
Operating income | 38,776 | (4,911,759) | 154,423 | 119,012 |
Other income (expense), net | (88,185) | 924,186 | (277,785) | (144,355) |
Income (loss) before income taxes including non-controlling interests | (49,409) | (3,987,573) | (123,362) | (25,343) |
Total Assets | 2,159,037 | 2,237,991 | 7,499,253 | 7,626,142 | $ 2,433,755
Property, plant and equipment, net | 1,728,787 | 1,733,419 | 6,977,776 | 7,027,109 | $ 1,988,076
Capital expenditures | 18,072 | 225,341 | 843,368 | 2,203,453 |
Depreciation, depletion and amortization | 16,094 | 291,115 | 787,192 | 636,296 |
General and administrative expenses | 14,224 | 145,294 | 123,506 | 121,346 |
Equity-based compensation | 270 | 31,315 | 33,607 | 29,273 |
Impairment | 0 | 4,937,143 | 10,257 | 384,228 |
External Customer |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 119,915 | 963,419 |  |  |
E&P |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 93,794 |  | 1,859,506 | 2,197,810 |
Acquisitions of oil and gas properties | 0 | 0 | 21,000 | 951,900 |
Midstream |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 43,257 | 376,815 | 488,427 | 286,642 |
Operating segments | E&P |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 93,794 | 775,888 | 1,859,506 | 2,197,810 |
Operating income | 18,662 | (4,957,630) | (75,986) | (14,992) |
Other income (expense), net | (87,161) | 842,783 | (260,720) | (142,230) |
Income (loss) before income taxes including non-controlling interests | (68,499) | (4,114,847) | (336,706) | (157,222) |
Total Assets | 1,093,253 |  | 6,418,610 | 6,747,616 |
Property, plant and equipment, net | 837,020 |  | 5,939,389 | 6,162,975 |
Capital expenditures | 15,403 | 203,847 | 642,352 | 1,934,970 |
Depreciation, depletion and amortization | 13,789 | 271,002 | 771,640 | 623,133 |
General and administrative expenses | 12,234 | 125,818 | 108,945 | 109,323 |
Equity-based compensation | 0 | 29,794 | 32,755 | 28,393 |
Impairment |  | 4,825,530 | 10,257 | 384,228 |
Operating segments | E&P | External Customer |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 93,794 | 775,888 |  |  |
Operating segments | Midstream |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 26,121 | 187,531 | 212,238 | 124,137 |
Operating income | 20,702 | 51,989 | 241,161 | 143,126 |
Other income (expense), net | (1,024) | 84,627 | (17,065) | (2,125) |
Income (loss) before income taxes including non-controlling interests | 19,678 | 136,616 | 224,096 | 141,001 |
Total Assets | 1,066,060 |  | 1,121,159 | 907,677 |
Property, plant and equipment, net | 892,043 |  | 1,078,903 | 893,285 |
Capital expenditures | 3,054 | 24,266 | 212,381 | 277,626 |
Depreciation, depletion and amortization | 4,199 | 36,670 | 37,152 | 29,282 |
General and administrative expenses | 3,850 | 34,103 | 31,737 | 24,700 |
Equity-based compensation | 270 | 1,930 | 1,744 | 1,547 |
Impairment |  | 111,613 | 0 | 0 |
Operating segments | Midstream | External Customer |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 26,121 | 187,531 |  |  |
Inter-segment | E&P |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 0 | 0 | 0 | 0 |
Inter-segment | Midstream |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 17,136 | 189,284 | 276,189 | 162,505 |
Eliminations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | (17,136) | (189,284) | (276,189) | (162,505) |
Operating income | (588) | (6,118) | (10,752) | (9,122) |
Other income (expense), net | 0 | (3,224) | 0 | 0 |
Income (loss) before income taxes including non-controlling interests | (588) | (9,342) | (10,752) | (9,122) |
Total Assets | (276) |  | (40,516) | (29,151) |
Property, plant and equipment, net | (276) |  | (40,516) | (29,151) |
Capital expenditures | (385) | (2,772) | (11,365) | (9,143) |
Depreciation, depletion and amortization | (1,894) | (16,557) | (21,600) | (16,119) |
General and administrative expenses | (1,860) | (14,627) | (17,176) | (12,677) |
Equity-based compensation | $ 0 | (409) | (892) | (667) |
Impairment |  | $ 0 | $ 0 | $ 0 |

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