Financial instruments and related risk management (Exposure to credit risk receivables) (Details) - CAD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of detailed information about financial instruments [line items] | ||
| Trade receivables | $ 338,426 | $ 309,570 |
| Allowance For Credit Losses [Member] | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Trade receivables | 0 | |
| Gross carrying amount [Member] | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Trade receivables | 338,426 | |
| Gross carrying amount [Member] | Investment Grade Rating [Member] | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Trade receivables | 318,933 | |
| Gross carrying amount [Member] | Non-Investment Grade Rating [Member] | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Trade receivables | $ 19,493 |