v3.26.1
Earnings Per Share (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
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]        
Net income (loss) attributable to Infinity Natural Resources, Inc. $ 31,752 $ 17,988 $ 29,887 $ (16,581)
Series A Preferred Stock cumulative undeclared dividends (6,511) 0 (9,612) 0
Net income attributable to Infinity Natural Resources, Inc. - basic 25,241 17,988 20,275 (16,581)
Net income attributable to Infinity Natural Resources, Inc. - diluted $ 25,241 $ 17,988 $ 20,275 $ (16,581)
Weighted average number of shares of Class A common stock outstanding:        
Weighted average number of common units outstanding—basic (in shares) 18,711,659 15,237,500 18,190,162 15,237,500
Weighted-average shares of Class A common stock outstanding—diluted (in shares) 36,207,325 15,237,500 30,558,472 15,237,500
Net income (loss) available to Class A common stockholders per share - basic (in dollars per share) [1] $ 1.35 $ 1.18 $ 1.11 $ (1.09)
Net income (loss) available to Class A common stockholders per share - diluted (in dollars per share) [1] $ 0.88 $ 1.18 $ 0.98 $ (1.09)
RSUs        
Weighted average number of shares of Class A common stock outstanding:        
Effect of dilutive securities (in shares) 683,511 0 571,936 0
Series A Preferred Stock        
Weighted average number of shares of Class A common stock outstanding:        
Effect of dilutive securities (in shares) 16,812,155 0 11,796,374
[1] Refer to Note 14 – Earnings Per Share to this Quarterly Report for basic and diluted earnings per share calculations.