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Financial instruments and risk management - Maximum credit exposure (Details) - CAD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Fair Value Disclosures [Abstract] |  |
Trade accounts receivable | $ 65,386 | $ 39,625
Holdbacks | 363 | 372
Accrued trade receivables | 16,556 | 33,207
Contract receivables, included in accounts receivable | 82,305 | 73,204
Other receivables | 15,550 | 10,607
Total accounts receivable | 97,855 | 83,811
Contract assets | 35,027 | 15,802
Total | $ 132,882 | $ 99,613

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