Property, Plant and Equipment - Additional Information (Details) - CAD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Property Plant And Equipment [Line Items]
Depreciation of property, plant and equipment			$ 10,628	$ 16,568
Costs Recorded in Cost of Goods Sold
Property Plant And Equipment [Line Items]
Depreciation of property, plant and equipment	$ 4,276	$ 5,070	9,256	14,498
Selling, General and Administrative Expenses
Property Plant And Equipment [Line Items]
Depreciation of property, plant and equipment	$ 670	$ 809	$ 1,372	$ 2,070