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Business acquisition - Narrative (Details) - MacKellar - CAD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 01, 2023 | Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Percentage of business acquired | 100.00% |  |  |
Total consideration transferred | $ 179,668 |  |  |
Financing obligations, payments | 73,657 |  |  |
Finance lease obligations, payments | $ 18,509 | $ 18,509 |  |
Revenue |  |  | $ 561,944 | $ 122,519
Net income |  |  | $ 64,763 | $ 13,946

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