v3.25.2
Fair Value Measurements - Schedule of Costs and Fair Values of Investments in Debt Securities Held in Decommissioning Trust Fund (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Cost    
Less than 5 years $ 23,114 $ 10,708
5 years to 10 years 0 0
Due after 10 years 0 0
Total 23,114 10,708
Estimated Fair Value    
Less than 5 years 23,190 10,653
5 years to 10 years 0 0
Due after 10 years 0 0
Total $ 23,190 $ 10,653