Financial Instruments - Credit risk (Details) - 12 months ended Dec. 31, 2024 $ in Thousands, $ in Thousands |
CAD ($) |
USD ($) |
|---|---|---|
| Financial Instruments | ||
| Undiscounted contractual amount due out of surplus cash of subsidiary | $ 60,535 | $ 42,070 |
| Difference between carrying amount of the loan payable and amount would be contractually required to pay at maturity | $ 53,453 | |
| Credit risk | Bottom of range | ||
| Financial Instruments | ||
| Average contractual credit period for trade receivables | 25 days | |
| Credit risk | Top of range | ||
| Financial Instruments | ||
| Minimum expected repayment period of undiscounted contractual due | 10 years | |
| Average contractual credit period for trade receivables | 45 days | |
| Average contractual credit period for sales | 180 days |