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Derivative financial instruments - Additional information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of derivative financial instruments [Line Items]      
Hedge operations $ 12,774,000 $ (51,952,000) $ (6,464,000)
Unrealized gain (loss) before tax 10,696,000 6,678,000 (11,142,000)
Hedge ineffectiveness 454,000 1,403,000 (1,857,000)
Effect on settlement of hedging financial instruments 818,000 1,547,000 146,000
Interest rate hedge      
Disclosure of derivative financial instruments [Line Items]      
Unrealized gain (loss) before tax 644,000 1,991,000 (2,635,000)
Effect on settlement of hedging financial instruments 818,000 (1,547,000) (146,000)
Unrealized gain (loss) net of tax income 454,000 1,404,000 (1,858,000)
Copper and Zinc prices hedge      
Disclosure of derivative financial instruments [Line Items]      
Unrealized gain (loss) before tax 15,171,000 9,472,000 15,804,000
Balance payable   1,200,000  
Balance receivable 2,500,000    
Unrealized gain (loss) net of tax income 10,696,000 6,678,000 11,142,000
Other reserves [member] | Copper and Zinc prices hedge      
Disclosure of derivative financial instruments [Line Items]      
Hedge operations $ 12,774,000 $ (51,952,000) $ (6,464,000)