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Financial risk management - Additional Information (Details)
₺ in Thousands, $ in Thousands
 1 Months Ended 12 Months Ended
Apr. 30, 2023
$ / oz
$ / t
Dec. 31, 2023
USD ($)
$ / t
$ / oz
Dec. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
May 31, 2023
oz
Feb. 28, 2023
TRY (₺)
Dec. 31, 2021
USD ($)
Aug. 26, 2021
Disclosure of risk management [line items]                
Increase/decrease in the U.S. dollar exchange rate against all currencies   1.00%            
Decrease/increase in profit (loss) before taxes due to 1% increase/decrease in the U.S. dollar exchange rate against   $ 942   $ 61        
Percentage of reasonably possible increase in unobservable input, liabilities   0.50%            
Cash and cash equivalents   $ 540,473   279,735     $ 481,327  
Number of day's from shipment payment is made for metal sales   15 days            
Debt   $ 636,059   $ 494,414        
Foreign exchange forward                
Disclosure of risk management [line items]                
Percentage of strengthening (weakening) of euro against major currency   10.00%            
Increase (decrease) to earnings before income tax   $ 17,000            
Gold commodity swaps                
Disclosure of risk management [line items]                
Price per unit increase (decrease) that would impact earnings before tax | $ / oz 2,160 200            
Increase (decrease) to earnings before income tax   $ 6,000            
Copper commodity swaps                
Disclosure of risk management [line items]                
Price per unit increase (decrease) that would impact earnings before tax | $ / t   1,000            
Increase (decrease) to earnings before income tax   $ 6,000            
Copper forward price (usd per tonne) | $ / t 8,525              
Gold collars                
Disclosure of risk management [line items]                
Price per unit increase (decrease) that would impact earnings before tax | $ / oz 200              
Increase (decrease) to earnings before income tax   19,000 $ 15,000          
Derivative transaction, monthly settlement quantity (in ounces) | oz         16,667      
Interest rate swaps                
Disclosure of risk management [line items]                
Increase (decrease) to earnings before income tax   7,000            
Floating interest rate | Interest rate swaps                
Disclosure of risk management [line items]                
Derivative instrument, coverage percentage 70.00%              
Turkish Lira Deposits                
Disclosure of risk management [line items]                
Cash and cash equivalents | ₺           ₺ 35    
Senior Notes due 2029                
Disclosure of risk management [line items]                
Debt interest rate (as a percent)               6.25%
Revolving credit facility                
Disclosure of risk management [line items]                
Borrowings, remaining available amount   $ 110,215