Contract Obligations (Tables) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Contract Obligations [Abstract] | |
| Summary of Contract Obligations | (US$ thousands) Short-term Long-term Total Coal leases contract liability $ 843 $ 18,818 $ 19,661 Stanwell below-market coal supply agreement 21,602 2,355 23,957 Stanwell deferred consideration liability — 346,768 346,768 Stanwell prepaid coal supply liability — 155,027 155,027 $ 22,445 $ 522,968 $ 545,413 (US$ thousands) Short-term Long-term Total Coal leases contract liability $ 843 $ 19,156 $ 19,999 Stanwell below-market coal supply agreement 36,247 8,616 44,863 Stanwell deferred consideration liability — 285,050 285,050 $ 37,090 $ 312,822 $ 349,912 |