Description of the Business and Basis of Presentation	3 Months Ended
Description of the Business and Basis of Presentation	Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business and Basis of Presentation	Description of the Business and Basis of Presentation Description of Business. Infinity Natural Resources, Inc., together with its subsidiaries (collectively referred to as “INR”, the “Company,” “we,” “our,” or “us”, unless the context otherwise indicates), was incorporated in the state of Delaware on May 15, 2024 in anticipation of a potential initial public offering and related reorganization transactions. The Company is an oil and natural gas exploration and production company engaged in the acquisition, exploration, and development of properties for the production of oil, natural gas, and natural gas liquids (“NGLs”) from underground reservoirs. Our operations are located in the Appalachian Basin in the northeastern United States. Initial Public Offering. On January 30, 2025, the Company's registration statement on Form S-1 relating to its initial public offering (“IPO”) was declared effective by the Securities and Exchange Commission (“SEC”), and the shares of its Class A common stock, par value $0.01 per share (“Class A common stock”), began trading on the New York Stock Exchange (“NYSE”) on January 31, 2025. The IPO closed in February 2025, pursuant to which the Company issued and sold 15,237,500 shares of its Class A common stock at a public offering price of $20.00 per share, including 1,987,500 shares issued pursuant to the full exercise of the underwriters’ option to purchase additional shares. The Company received net proceeds of approximately $286.5 million, after deducting underwriting discounts and commissions of $18.3 million. The Company contributed the net proceeds of the IPO to Infinity Natural Resources, LLC (“INR Holdings”), and INR Holdings used the net proceeds, after payment of certain offering expenses, to repay borrowings outstanding under its revolving credit facility. Corporate Reorganization. In connection with the IPO, we underwent a corporate reorganization whereby: (a) the membership interests of the existing owners (the “Legacy Owners”) in INR Holdings were recapitalized into a single class of units (the “INR Units”), and, in exchange for their existing membership interests, the Legacy Owners received INR Units and an equal number of shares of the Company’s Class B common stock, par value $0.01 per share (“Class B common stock”); and (b) we contributed the net proceeds of the IPO to INR Holdings in exchange for newly issued INR Units and a managing member interest in INR Holdings (the “Corporate Reorganization”). After giving effect to the Corporate Reorganization and the IPO, we own an approximate 25.0% interest in INR Holdings and the Legacy Owners own an approximate 75.0% interest in INR Holdings. Pursuant to the Second Amended and Restated Limited Liability Company Agreement of INR Holdings (the “INR Holdings LLC Agreement”), holders of INR Units (other than INR) are entitled to exchange their INR Units, and surrender an equivalent number of shares of Class B common stock, for a number of shares of Class A common stock on a one-for-one basis or, at our option, the receipt of an equivalent amount of cash. The Company is a holding company whose sole material asset consists of membership interests in INR Holdings. The Company is the managing member of INR Holdings and controls and is responsible for all operational, management and administrative decisions relating to INR Holdings’ business and consolidates the financial results of INR Holdings and reports redeemable non-controlling interests in its consolidated financial statements related to the INR Units that the Legacy Owners own in INR Holdings. The historical consolidated financial statements included in this Quarterly Report for periods prior to the Corporate Reorganization and IPO are based on the financial statements of our predecessor, INR Holdings. The historical financial data of our predecessor may not yield an accurate indication of what our actual results would have been if the Corporate Reorganization and IPO had been completed at the beginning of the periods presented or of what our future results of operations are likely to be. Basis of Accounting and Presentation. The accompanying unaudited condensed consolidated financial statements present the financial position, results of operations, and cash flows of the Company in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and regulations of the SEC for interim financial information. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2024 and the related notes included in the Company’s 2024 Form 10-K. The December 31, 2024, condensed consolidated balance sheet was derived from the Company’s audited consolidated financial statements as of that date. In the opinion of management, all adjustments, consisting of normal recurring adjustments considered necessary for a fair presentation of interim financial information, have been included. The unaudited results of operations for the interim periods reported are not necessarily indicative of results to be expected for the full year. The Company had no material other comprehensive income or loss items. Accordingly, a separate statement of comprehensive loss has not been presented in these unaudited condensed consolidated financial statements. All intercompany balances and transactions are eliminated upon consolidation.