v3.26.1
Fair Value Measurements and Financial Instruments - Schedule of Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value $ 184,922   $ 184,922   $ 114,997
Gain / (Loss) on Investments 42,913 $ 68,242 60,229 $ 87,530  
Investment in Oklo Inc.          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value 28,050   28,050   38,465
Gain / (Loss) on Investments 1,469 70,627 (10,415) 87,235  
Investment in Tamboran Resources Corporation          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value 43,437   43,437   24,325
Gain / (Loss) on Investments (20,230) (2,385) 7,284 295  
Investment in Fervo Energy Company          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value 104,832   104,832   40,738
Gain / (Loss) on Investments 64,094 0 64,094 0  
Other Investments Carried at Fair Value          
Fair Value Measurement Inputs and Valuation Techniques [Line Items]          
Fair Value 8,603   8,603   $ 11,469
Gain / (Loss) on Investments $ (2,420) $ 0 $ (734) $ 0