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Deconsolidation of Osisko Development and discontinued operations (Narrative) (Details)
$ / shares in Units, $ / shares in Units, $ in Thousands, $ in Millions
 1 Months Ended 12 Months Ended
Sep. 30, 2022
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May 31, 2022
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May 31, 2022
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Apr. 30, 2022
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Apr. 30, 2022
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Mar. 31, 2022
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Mar. 31, 2022
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Mar. 31, 2021
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Feb. 28, 2021
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Jan. 31, 2021
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Dec. 31, 2022
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Dec. 31, 2021
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Dec. 31, 2020
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May 31, 2022
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Disclosure of analysis of single amount of discontinued operations [line items]                            
Investments in associates                     $ 319,763 $ 125,354    
Recognized royalty and stream interests on assets held                     122,053      
Net loss from discontinued operations                     (268,475) $ (133,302)    
Osisko Development Corp [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Proportion of ownership interest in subsidiary | Rate 44.10%                     75.10%    
Investments in associates $ 207,000                          
Recognized royalty and stream interests on assets held 122,100                          
Net non-cash loss on deconsolidation $ 140,900                          
Share consolidation ratio of ODV shares   a three for one basis (3:1)                        
First tranche of non-brokered private placement [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Number of units issued of ODV | shares                   9,346,464        
Price per unit issued of ODV | $ / shares                   $ 7.5        
Gross proceeds from issuance of units of ODV                   $ 68,600        
Description of units issued of ODV                   Each unit consisted of one common share of Osisko Development and one-half of one common share purchase warrant of Osisko Development,        
Exercise price for warrants issued of ODV | $ / shares                   $ 10        
Final tranche of non-brokered private placement [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Number of units issued of ODV | shares                 1,515,731          
Price per unit issued of ODV | $ / shares                 $ 7.5          
Gross proceeds from issuance of units of ODV                 $ 11,200          
Description of units issued of ODV                 Each unit consisted of one common share of Osisko Development and one-half of one common share purchase warrant of Osisko Development,          
Exercise price for warrants issued of ODV | $ / shares                 $ 10          
Non-brokered private placement [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Proceeds from private placements received by ODV                         $ 73,900  
Share issue expenses from the non-brokered private placement of ODV                         1,100  
Share issue expenses, net of tax from the non-brokered private placement of ODV                         $ 800  
Bought deal brokered private placement of flow-through shares [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Proceeds from private placements received by ODV               $ 33,600            
Share issue expenses from the non-brokered private placement of ODV               1,500            
Share issue expenses, net of tax from the non-brokered private placement of ODV               $ 1,100            
Number of flow-through shares issued from the brokered private placement of ODV | shares               2,055,742            
Price per flow-through share issued from brokered private placement | $ / shares               $ 9.05            
Number of charity flow-through shares issued from the brokered private placement of ODV | shares               1,334,500            
Price per charity flow-through shares issued from the brokered private placement of ODV | $ / shares               $ 11.24            
Recognition of deferred premium on flow-through shares from brokered private placement of ODV               $ 7,900            
Share issue costs attributed on deferred premium from brokered private placement of ODV               $ 500            
ODV bought deal private placement [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Description of units issued of ODV           Each ODV Unit was comprised of one common share of the company (each, an "ODV Common Share") and one common share purchase warrant (each, an "ODV Warrant"), with each ODV Warrant entitling the holder thereof to purchase one additional ODV Common Share at a price of $7.60 per ODV Common Share for a period of 60 months following the date hereof. Each ODV Unit was comprised of one common share of the company (each, an "ODV Common Share") and one common share purchase warrant (each, an "ODV Warrant"), with each ODV Warrant entitling the holder thereof to purchase one additional ODV Common Share at a price of $7.60 per ODV Common Share for a period of 60 months following the date hereof.              
Exercise price for warrants issued of ODV | $ / shares           $ 7.6                
Proceeds from private placements received by ODV           $ 103,500                
Number of ODV Subscription Receipts | shares           13,732,900 13,732,900              
Price per Offered Security (ODV Subscription Receipts and ODV Units) | $ / shares           $ 4.45                
Number of ODV Units | shares           9,525,850 9,525,850              
Percentage of cash commission paid to the underwriters | Rate           5.00% 5.00%              
First tranche of ODV non-brokered private placement [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Proceeds from private placements received by ODV           $ 108,100 $ 84.8              
Number of ODV Subscription Receipts | shares           24,215,099 24,215,099              
Price per Offered Security (ODV Subscription Receipts and ODV Units) | $ / shares             $ 3.5              
Second tranche of ODV non-brokered private placement [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Proceeds from private placements received by ODV           $ 41,000 $ 32.8              
Number of ODV Subscription Receipts | shares           9,365,689 9,365,689              
Price per Offered Security (ODV Subscription Receipts and ODV Units) | $ / shares             $ 3.5              
Third tranche of the ODV non-brokered private placement [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Proceeds from private placements received by ODV       $ 2,200 $ 1.8                  
Number of ODV Subscription Receipts | shares       512,980 512,980                  
Price per Offered Security (ODV Subscription Receipts and ODV Units) | $ / shares         $ 3.5                  
ODV non-brokered private placement [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Description of units issued of ODV   Each ODV Unit was comprised of one ODV Common Share and one ODV Warrant, with each ODV Warrant entitling the holder thereof to purchase one additional ODV Common Share at a price of US$6.00 per ODV Common Share for a period of five years following the date of issue.                        
Exercise price for warrants issued of ODV | $ / shares     $ 6                      
Osisko Development, discontinued operations [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Revenues of discontinued operations                     44,820 $ 7,275    
Net loss from discontinued operations                     (268,475) $ (133,302)    
Tintic Consolidated Metals LLC [Member] | Osisko Development Corp [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Number of ODV shares issued for Tintic acquisition | share   12,049,449 12,049,449                     12,049,449
Cash transfered for Tintic acquisition by ODV   $ 74,700 $ 74,700                     $ 58.7
NSR royalty percentage   2.00%                        
Buyback right percentage   50.00%                        
Deferred consideration   $ 15,900 15,900                     12.5
Transaction costs related to acquisition   4,700                        
Consideration paid   199,473 199,473                     156.6
Convertible instruments   $ 10,800 $ 10,800                     $ 8.5
Tintic Consolidated Metals LLC [Member] | Osisko Development, discontinued operations [Member]                            
Disclosure of analysis of single amount of discontinued operations [line items]                            
Revenues of discontinued operations                     11,500      
Net loss from discontinued operations                     $ 1,600