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Property, Plant and Equipment - Additional Information (Details) - CAD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Property Plant And Equipment [Line Items]        
Depreciation of property, plant and equipment     $ 43,185 $ 56,467
Costs Recorded in Cost of Goods Sold        
Property Plant And Equipment [Line Items]        
Depreciation of property, plant and equipment $ 12,033 $ 13,813 34,423 38,663
Selling, General and Administrative Expenses        
Property Plant And Equipment [Line Items]        
Depreciation of property, plant and equipment $ 1,544 $ 5,546 $ 8,762 $ 17,804