Interests in Resource Properties - Assets included in non-current assets (Details) - CAD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Interests In Resource Properties [Roll Forward] | ||
| Opening balance | $ 196,634 | |
| Ending balance | 192,142 | $ 196,634 |
| Interest in an iron ore development project | ||
| Disclosure Of Interests In Resource Properties [Roll Forward] | ||
| Opening balance | 196,634 | 201,802 |
| Ending balance | 192,142 | 196,634 |
| Interest in an iron ore development project | Gross carrying amount | ||
| Disclosure Of Interests In Resource Properties [Roll Forward] | ||
| Opening balance | 218,203 | 218,203 |
| Ending balance | 218,203 | 218,203 |
| Interest in an iron ore development project | Accumulated depreciation | ||
| Disclosure Of Interests In Resource Properties [Roll Forward] | ||
| Opening balance | 21,569 | 16,401 |
| Additions | 4,492 | 5,168 |
| Ending balance | $ 26,061 | $ 21,569 |