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Employee Benefit Plans - Schedule of Balance Sheet Obligations (Details) $ in Thousands, $ in Thousands | Sep. 30, 2025 CAD ($) | Sep. 30, 2025 USD ($) | Dec. 31, 2024 CAD ($) | Dec. 31, 2024 USD ($)
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Pension Plans Canadian [Member] |  |  |  |
Schedule of Balance Sheet Obligations [Line Items] |  |  |  |
Included in other long-term liabilities | $ 42,793 |  | $ 41,540 |
Included in other long-term assets | 99,762 |  | 99,554 |
Pension Plans US [Member] |  |  |  |
Schedule of Balance Sheet Obligations [Line Items] |  |  |  |
Included in other long-term liabilities |  | $ 2,510 |  | $ 2,993
Included in other long-term assets |  |  |  |
Pension Plans Total [Member] |  |  |  |
Schedule of Balance Sheet Obligations [Line Items] |  |  |  |
Included in other long-term liabilities | 45,303 |  | 44,533 |
Included in other long-term assets | 99,762 |  | 99,554 |
Other Post-employment Benefit Plans Canadian [Member] |  |  |  |
Schedule of Balance Sheet Obligations [Line Items] |  |  |  |
Included in other long-term liabilities | 23,136 |  | 22,394 |
Included in other long-term assets |  |  |  |
Other Post-employment Benefit Plans US [Member] |  |  |  |
Schedule of Balance Sheet Obligations [Line Items] |  |  |  |
Included in other long-term liabilities |  | 3,498 |  | 3,547
Included in other long-term assets |  |  |  |
Other Post-employment Benefit Plans Total [Member] |  |  |  |
Schedule of Balance Sheet Obligations [Line Items] |  |  |  |
Included in other long-term liabilities | 26,634 |  | 25,941 |
Included in other long-term assets |  |  |  |

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