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Natural Gas and Oil Exploration, Development and Production Activities (Tables) | 9 Months Ended
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Sep. 30, 2025
Extractive Industries [Abstract] |
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization | Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (a)
| September 30, 2025 |  |  | December 31, 2024 |
| (in thousands) |
Natural gas properties: |  |  |  |  |
Properties subject to depletion | $ | 11,450,212 |  |  | $ | 11,058,771 |
Unproved properties |  | 844,308 |  |  |  | 819,656 |
Total |  | 12,294,520 |  |  |  | 11,878,427 |
Accumulated depletion and depreciation |  | (5,667,298 | ) |  |  | (5,456,727 | )
Net capitalized costs | $ | 6,627,222 |  |  | $ | 6,421,700 |
(a) Includes capitalized asset retirement costs and the associated accumulated amortization.
Costs Incurred for Property Acquisition, Exploration and Development | Costs Incurred for Property Acquisition, Exploration and Development (b)
| Nine Months Ended September 30, 2025 |  |  | Year Ended December 31, 2024 |
| (in thousands) |
Acquisitions: |  |  |  |  |
Acreage purchases | $ | 43,006 |  |  | $ | 57,869 |
Development |  | 433,417 |  |  |  | 577,093 |
Exploration: |  |  |  |  |
Drilling |  | 4,593 |  |  |  | 12,569 |
Expense |  | 21,426 |  |  |  | 25,489 |
Stock-based compensation expense |  | 998 |  |  |  | 1,354 |
Pipeline and facilities: |  |  |  |  |
Development |  | 6,922 |  |  |  | 4,336 |
Subtotal |  | 510,362 |  |  |  | 678,710 |
Asset retirement obligations |  | 3,007 |  |  |  | 13,845 |
Total costs incurred | $ | 513,369 |  |  | $ | 692,555 |
(b) Includes costs incurred whether capitalized or expensed.

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