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Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Tables) | 9 Months Ended
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Sep. 30, 2023
Extractive Industries [Abstract] |
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization |
|  | September 30, 2023 |  |  | December 31, 2022 |
|  | (in thousands) |
Natural gas properties: |  |  |  |  |  |
Properties subject to depletion |  | $ | 10,312,071 |  |  | $ | 9,855,287 |
Unproved properties |  |  | 778,430 |  |  |  | 800,592 |
Total |  |  | 11,090,501 |  |  |  | 10,655,879 |
Accumulated depletion and depreciation |  |  | (5,019,169 | ) |  |  | (4,765,475 | )
Net capitalized costs |  | $ | 6,071,332 |  |  | $ | 5,890,404 |
(a) Includes capitalized asset retirement costs and the associated accumulated amortization.

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