Income taxes - Schedule of Expense (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current
Canadian	$ (18,460)	$ (29,591)	$ 81,392
Foreign	671	0	1,300
Current tax expense (benefit)	(17,789)	(29,591)	82,692
Deferred and other
Canadian	749	4,526	2,322
Foreign	(20,498)	(2,566)	(4,434)
Deferred tax expense (benefit)	(19,749)	1,960	(2,112)
Income tax expense (recovery)	$ (37,538)	$ (27,631)	$ 80,580