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Segmented information - Information on Operations by Geographic Area (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Segment Reporting Information [Line Items]        
Revenue $ 527,523 $ 343,638 $ 1,162,065 $ 808,539
United States        
Segment Reporting Information [Line Items]        
Revenue 415,431 309,715 927,258 726,871
Canada        
Segment Reporting Information [Line Items]        
Revenue 35,951 33,923 83,803 81,668
Other regions        
Segment Reporting Information [Line Items]        
Revenue $ 76,141 $ 0 $ 151,004 $ 0