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Variable Interest Entities - AllDale (Detail) - USD ($) $ in Thousands | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Carrying value of investment | $ 54,582 | $ 29,628 | $ 35,532 | $ 36,902 | $ 45,088 | $ 46,503
Cavalier Minerals |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Ownership interest in VIE (as a percent) | 96.00% |  |  |  |  |
Cavalier Minerals | Bluegrass Minerals |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Distributions to be received (as a percent) | 25.00% |  |  |  |  |
Noncontrolling ownership interest (as a percent) | 4.00% |  |  |  |  |
AllDale III | Cavalier Minerals |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Ownership percentage by limited partners | 72.00% |  |  |  |  |
AllDale III |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Distribution after hurdles (as a percent) | 25.00% |  |  |  |  |
Specified internal rate of return (as a percent) | 10.00% |  |  |  |  |
Percentage of available cash distributed | 125.00% |  |  |  |  |
Carrying value of investment | $ 21,300 |  | $ 22,500 |  |  |
VIE, Primary Beneficiary | AllDale I and II | AllDale III |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Ownership percentage by limited partners | 97.00% |  |  |  |  |
VIE, Primary Beneficiary | AllDale I and II | General Partners' Capital |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Distributions to be received (as a percent) | 20.00% |  |  |  |  |
VIE, Primary Beneficiary | AllDale I and II | Limited Partners' Capital |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Distributions to be received (as a percent) | 80.00% |  |  |  |  |
VIE, Not Primary Beneficiary | AllDale III | AllDale III |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |
Ownership percentage by limited partners | 13.90% |  |  |  |  |

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