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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
Nov. 30, 2021
Nov. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Investments in associates and joint ventures            
Non-current assets     $ 3,822,266 $ 3,390,465    
Current liabilities     (844,937) (360,436)    
Non-current liabilities     (1,178,343) (819,324)    
Equity     2,538,531 2,799,857 $ 2,968,200 $ 3,028,226
Compania Minera Coimolache S.A. [Member]            
Investments in associates and joint ventures            
Current assets     216,581 205,893    
Non-current assets     184,635 213,073    
Current liabilities     (36,521) (45,589)    
Non-current liabilities     (106,129) (104,873)    
Equity     258,566 268,504    
Adjustments to conform to the accounting policies of the Group     (4,954) (7,037)    
Equity, adjusted     253,612 261,467    
Group's interest     $ 101,683 $ 104,833    
Tinka Resources Ltd [Member]            
Investments in associates and joint ventures            
Non-current assets $ 50,461 $ 50,464        
Current liabilities (211) (876)        
Equity 58,917 63,663        
Adjustments to conform to the accounting policies of the Group 1,042 2,982        
Equity, adjusted $ 59,959 $ 66,645