v3.25.2
Property, Plant and Equipment - Carrying Values of Property, Plant and Equipment (Details) - CAD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Mar. 31, 2023
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment $ 268,107 $ 270,399 $ 276,221 $ 283,468 $ 294,324 $ 322,969
Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 559,773       562,003  
Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (290,970)       (264,020)  
Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (696)       (3,659)  
Owned assets            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 240,814       263,590 288,866
Owned assets | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 506,012       505,571  
Owned assets | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (265,069)       (240,834)  
Owned assets | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (129)       (1,147)  
Owned assets | Land            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 43,937       43,914 50,257
Owned assets | Land | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 43,937       43,914  
Owned assets | Land | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 0       0  
Owned assets | Land | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 0       0  
Owned assets | Buildings            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 131,343       143,867 151,623
Owned assets | Buildings | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 242,939       242,052  
Owned assets | Buildings | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (111,596)       (97,885)  
Owned assets | Buildings | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 0       (300)  
Owned assets | Construction in progress            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 27,153       25,685 25,618
Owned assets | Construction in progress | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 27,153       26,330  
Owned assets | Construction in progress | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 0       0  
Owned assets | Construction in progress | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 0       (645)  
Owned assets | Computer software & equipment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 1,196       1,198 1,723
Owned assets | Computer software & equipment | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 31,963       31,333  
Owned assets | Computer software & equipment | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (30,767)       (30,135)  
Owned assets | Computer software & equipment | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 0       0  
Owned assets | Furniture & fixtures            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 995       1,456 1,796
Owned assets | Furniture & fixtures | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 7,614       7,900  
Owned assets | Furniture & fixtures | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (6,619)       (6,444)  
Owned assets | Furniture & fixtures | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 0       0  
Owned assets | Production & other equipment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 36,190       47,470 57,849
Owned assets | Production & other equipment | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 152,406       154,042  
Owned assets | Production & other equipment | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (116,087)       (106,370)  
Owned assets | Production & other equipment | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (129)       (202)  
Right-of-use leased assets            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 27,293       30,734 34,103
Right-of-use leased assets | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 53,761       56,432  
Right-of-use leased assets | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (25,901)       (23,186)  
Right-of-use leased assets | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (567)       (2,512)  
Right-of-use leased assets | Land            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 11,629       12,289 12,545
Right-of-use leased assets | Land | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 13,494       13,890  
Right-of-use leased assets | Land | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (1,865)       (1,601)  
Right-of-use leased assets | Land | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 0       0  
Right-of-use leased assets | Buildings            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 15,388       18,100 20,953
Right-of-use leased assets | Buildings | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 34,801       37,252  
Right-of-use leased assets | Buildings | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (18,846)       (16,640)  
Right-of-use leased assets | Buildings | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (567)       (2,512)  
Right-of-use leased assets | Production & other equipment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 276       345 $ 605
Right-of-use leased assets | Production & other equipment | Cost            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment 5,466       5,290  
Right-of-use leased assets | Production & other equipment | Accumulated depreciation            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment (5,190)       (4,945)  
Right-of-use leased assets | Production & other equipment | Impairment            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment $ 0       $ 0