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Business acquisition - Schedule of unaudited pro forma information (Details) - MacKellar - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Business Acquisition [Line Items] |  |
Revenue | $ 1,296,328 | $ 1,086,460
Net income | $ 89,658 | $ 78,261

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