v3.26.3
Fair Value Measurements and Financial Instruments - Schedule of Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value $ 122,030   $ 122,030   $ 114,997
Gain / (Loss) on Investments (62,892) $ 68,353 (2,663) $ 155,883  
Investment in Oklo Inc.          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value 19,843   19,843   38,465
Gain / (Loss) on Investments (8,206) 57,644 (18,621) 144,879  
Investment in Tamboran Resources Corporation          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value 44,039   44,039   24,325
Gain / (Loss) on Investments 601 5,414 7,885 5,709  
Investment in Fervo Energy Company          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value 48,740   48,740   40,738
Gain / (Loss) on Investments (56,092) 0 8,002 0  
Other Investments Carried at Fair Value          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value 9,408   9,408   $ 11,469
Gain / (Loss) on Investments $ 805 $ 5,295 $ 71 $ 5,295