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Investments in affiliates and joint ventures - Narrative (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Jan. 01, 2023
Dec. 31, 2023
Dec. 31, 2022
Variable Interest Entity [Line Items]      
Cost of purchased equipment   $ 202,809 $ 111,499
Final cash distributions amount   19,330 12,760
Net cash outflow after offset   387 0
Contract asset, current   35,027 15,802
Revenue   957,220 769,539
Accounts receivable   97,855 83,811
Dene North Site Services Partnership      
Variable Interest Entity [Line Items]      
Cost of purchased equipment $ 2,600    
Final cash distributions amount 2,213    
Net cash outflow after offset $ 387    
Nuna      
Variable Interest Entity [Line Items]      
Revenue   165,741 213,745
Nuna | Variable Consideration - Unpriced Contract Modifications      
Variable Interest Entity [Line Items]      
Contract asset, current   8,701 1,391
Mikisew North American Limited Partnership ("MNALP")      
Variable Interest Entity [Line Items]      
Revenue   395,040 330,259
Accounts receivable   61,111 66,680
Equity Method Investee      
Variable Interest Entity [Line Items]      
Contract asset, current   12,019 0
Revenue   773,512 666,069
Accounts receivable   $ 41,157 $ 65,294