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Mining interests and plant and equipment - Disclosure of detailed information about mining interests and plant and equipment (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance $ 635,655 $ 489,512
Acquisition of Tintic by Osisko Development 182,229 0
Additions 50,986 190,100
Impairment (81,000) (58,417)
Mining exploration tax credits (6,275) (1,585)
Change in environmental rehabilitation assets (3,797) 19,522
Depreciation (12,935) (7,814)
Depreciation capitalized 896 4,136
Share-based compensation capitalized 388 2,127
Transfers 0 0
Disposals and others (6,191) (213)
Currency translation adjustments 24,567 (1,713)
Deconsolidation of development (777,576) 0
Closing balance 6,947 635,655
Cost [Member]    
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance 707,482  
Closing balance 11,889 707,482
Accumulated depreciation [Member]    
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance (71,827)  
Closing balance (4,942) (71,827)
Mining interests [Member]    
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance 543,953 459,303
Acquisition of Tintic by Osisko Development 169,175 0
Additions 36,754 131,908
Impairment (81,000) (58,417)
Mining exploration tax credits (6,275) (1,585)
Change in environmental rehabilitation assets (3,797) 19,522
Depreciation (2,385) 0
Depreciation capitalized 896 4,136
Share-based compensation capitalized 388 2,127
Transfers (0) (11,221)
Disposals and others (1,559) 0
Currency translation adjustments 21,183 (1,820)
Deconsolidation of development (677,333) 0
Closing balance 0 543,953
Mining interests [Member] | Cost [Member]    
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance 602,370  
Closing balance 0 602,370
Mining interests [Member] | Accumulated depreciation [Member]    
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance (58,417)  
Closing balance (0) (58,417)
Plant and equipment [Member]    
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance 91,702 30,209
Acquisition of Tintic by Osisko Development 13,054 0
Additions 14,232 58,192
Impairment 0 0
Mining exploration tax credits 0 0
Change in environmental rehabilitation assets 0 0
Depreciation (10,550) (7,814)
Depreciation capitalized 0 0
Share-based compensation capitalized 0 0
Transfers 0 11,221
Disposals and others (4,632) (213)
Currency translation adjustments 3,384 107
Deconsolidation of development (100,243) 0
Closing balance 6,947 91,702
Plant and equipment [Member] | Cost [Member]    
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance 105,112  
Closing balance 11,889 105,112
Plant and equipment [Member] | Accumulated depreciation [Member]    
Disclosure of detailed information about property, plant and equipment and Mining interests [line items]    
Beginning balance (13,410)  
Closing balance $ (4,942) $ (13,410)