Acquisitions - Schedule of Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | ||||
| Revenues | $ 171,019 | $ 104,381 | $ 341,968 | $ 219,450 |
| Net income (loss) | 107,999 | 74,138 | 104,925 | (51,723) |
| Net income (loss) attributable to Infinity Natural Resources, Inc. | $ 31,752 | $ 16,056 | $ 30,851 | $ (15,409) |
| Basic net income (loss) per share (in dollars per share) | $ 1.35 | $ 0.60 | $ 1.17 | $ (1.91) |
| Diluted net income (loss) per share (in dollars per share) | $ 0.88 | $ 0.60 | $ 1.01 | $ (1.91) |