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Oil and Gas Producing Activities (Tables) | 12 Months Ended
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Dec. 31, 2020
Oil and Gas Exploration and Production Industries Disclosures [Abstract] |
Capitalized Costs Related to Oil and Natural Gas Property Acquisition Exploration and Development Activities |
| As of December 31,
| 2019 |  | 2020
| (In thousands)
Proved properties: |  |  |
Leasehold costs | $ | 2,912,196 |  |  | $ | 3,010,760 |
Wells and related equipment and facilities | 1,165,317 |  |  | 1,636,428 |
Accumulated depreciation depletion and amortization | (485,851) |  |  | (901,003) |
| 3,591,662 |  |  | 3,746,185 |
Unproved properties | 410,897 |  |  | 332,765 |
| $ | 4,002,559 |  |  | $ | 4,078,950 |
Costs Incurred
Costs Incurred Related to Oil and Natural Gas Property Acquisition Exploration and Development Activities |
| Predecessor |  |  | Successor
| For the Period from January 1, 2018 through August 13, 2018 |  |  | For the Period from August 14, 2018 through December 31, 2018 |  | Year Ended December 31, 2019 |  | Year Ended December 31, 2020
| (In thousands)
Property acquisitions | $ | 39,323 |  |  |  | $ | 21,013 |  |  | $ | 2,097,451 |  |  | $ | — |
Exploration and development: |  |  |  |  |  |  |  |
Exploratory leasehold costs | — |  |  |  | — |  |  | — |  |  | 7,949 |
Development leasehold costs | 2,848 |  |  |  | 1,715 |  |  | 7,603 |  |  | 13,022 |
Development drilling and completion costs | 90,840 |  |  |  | 148,745 |  |  | 493,625 |  |  | 436,074 |
Other development costs | 13,871 |  |  |  | 13,612 |  |  | 9,339 |  |  | 34,525 |
Total capital expenditures | $ | 146,882 |  |  |  | $ | 185,085 |  |  | $ | 2,608,018 |  |  | $ | 491,570 |

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