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Property, plant, equipment and development costs - Distribution Of Depreciation Expenses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense $ 188,119 $ 173,239 $ 178,294
Cost of sales of goods      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense 164,543 147,032 159,652
Unabsorbed cost due to production stoppage      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense 10,420 14,877 4,569
Cost of sales of services      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense 9,037 8,153 8,109
Administrative expenses      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense 2,065 1,886 4,741
Property, plant, equipment and development costs      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense 1,799 1,039 963
Exploration in non-operating areas      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense 98 101 114
Selling expenses      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense 103 93 84
Other, net      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense $ 54 49 48
Discontinued operations, note 1(e)      
Disclosure of attribution of expenses by nature to their function [line items]      
Total depreciation expense   $ 9 $ 14