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Derivative financial instruments - Additional Information (Details)
€ in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Oct. 31, 2023
EUR (€)
€ / $
Aug. 31, 2023
EUR (€)
€ / $
Apr. 30, 2023
EUR (€)
$ / oz
€ / $
oz
t
$ / t
Dec. 31, 2023
USD ($)
oz
$ / t
$ / oz
Dec. 31, 2023
EUR (€)
oz
$ / t
$ / oz
May 31, 2023
oz
Euro forward contracts            
Disclosure of detailed information about hedges [line items]            
Derivative transaction, monthly recurring notional amount € 2,500 € 5,000        
Derivative transaction, monthly recurring delivery rate | € / $ 1.0785 1.1160        
Gold collars            
Disclosure of detailed information about hedges [line items]            
Derivative transaction, monthly settlement quantity (in ounces) | oz           16,667
Derivative transaction, quantity expired without financial settlement (in ounces) | oz       116,669 116,669  
Price per unit increase (decrease) that would impact earnings before tax | $ / oz     200      
Gold commodity swaps            
Disclosure of detailed information about hedges [line items]            
Derivative transaction, gold quantity (in ounces) | oz     32,000      
Price per unit increase (decrease) that would impact earnings before tax | $ / oz     2,160 200 200  
Copper commodity swaps            
Disclosure of detailed information about hedges [line items]            
Derivative transaction, copper quantity (in tonnes) | t     6,160      
Price per unit increase (decrease) that would impact earnings before tax | $ / t       1,000 1,000  
Copper forward price (usd per tonne) | $ / t     8,525      
Interest rate swaps            
Disclosure of detailed information about hedges [line items]            
Interest rate swap settlements in realized derivative cash gains | $       $ 423    
Interest rate swaps | Floating interest rate            
Disclosure of detailed information about hedges [line items]            
Derivative instrument, coverage percentage     70.00%      
Interest rate swaps | Commercial Loan            
Disclosure of detailed information about hedges [line items]            
Borrowings, interest payment frequency     6 months      
Interest rate swaps | Commercial Loan | Floating interest rate            
Disclosure of detailed information about hedges [line items]            
Derivative instrument, coverage percentage     70.00%      
Interest rate swaps | Commercial Loan | Fixed interest rate            
Disclosure of detailed information about hedges [line items]            
Debt interest rate (as a percent)     3.11%      
Foreign currency forward contracts | Commence on June 30, 2026            
Disclosure of detailed information about hedges [line items]            
Derivative transaction, recurring delivery amount     € 17,000      
Derivative transaction, recurring delivery occurrence period     6 months      
Average forward rate (euro per usd) | € / $     1.1473      
Foreign currency forward contracts | Commence on June 28, 2030            
Disclosure of detailed information about hedges [line items]            
Derivative transaction, recurring delivery amount     € 11,350      
Derivative transaction, recurring delivery occurrence period     6 months      
Average forward rate (euro per usd) | $ / oz     1.1704      
Foreign currency collars | Canadian dollar            
Disclosure of detailed information about hedges [line items]            
Notional amount expired | $       $ 96,000    
Foreign currency collars | Euro            
Disclosure of detailed information about hedges [line items]            
Notional amount expired         € 75,400