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Investments in associates and joint venture - Statements of financial position of Coimolache under IFRS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Investments in associates and joint ventures        
Non-current assets $ 3,882,847 $ 3,822,266    
Current liabilities (379,597) (844,937)    
Non-current liabilities (960,689) (1,178,343)    
Equity 3,162,941 2,538,531 $ 2,799,857 $ 2,968,200
Compania Minera Coimolache S.A.        
Investments in associates and joint ventures        
Current assets 208,382 216,581    
Non-current assets 157,203 184,635    
Current liabilities (21,565) (36,521)    
Non-current liabilities (95,822) (106,129)    
Equity 248,198 258,566    
Adjustments to conform to the accounting policies of the Group (2,804) (4,954)    
Equity, adjusted 245,394 253,612    
Group's interest 98,388 101,683    
Tinka resources Ltd        
Investments in associates and joint ventures        
Current assets 13,007 8,667    
Non-current assets 50,454 50,461    
Current liabilities (473) (211)    
Equity 62,988 58,917    
Adjustments to conform to the accounting policies of the Group (7,719) 1,042    
Equity, adjusted 55,269 59,959    
Group's interest $ 10,678 $ 11,573