Commitments and Contingencies (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Commitments and Contingencies Disclosure [Abstract] | |||||
| Throughput obligation | $ 0 | $ 0 | $ 0 | ||
| Coal royalty expense | $ 18,900,000 | $ 33,200,000 | $ 41,200,000 | $ 76,100,000 | |