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Acquisitions - Schedule of Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] |  |
Revenues | $ 175,726 | $ 115,070
Net loss | (3,074) | (126,177)
Net loss attributable to Infinity Natural Resources, Inc. | (907) | (34,023)
Accretion of Series A Preferred Stock cumulative undeclared dividends | (35,484) | (6,813)
Net loss attributable to Infinity Natural Resources, Inc.- basic | (36,391) | (40,836)
Net loss attributable to Infinity Natural Resources, Inc.- diluted | $ (36,391) | $ (40,836)
Net loss attributable to Infinity Natural Resources, Inc.- basic (in dollars per share) | $ (2.06) | $ (2.68)
Net loss attributable to Infinity Natural Resources, Inc.- diluted (in dollars per share) | $ (2.06) | $ (2.68)

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