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Subsidiaries with material non-controlling interest - Statements of financial position (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]        
Current assets $ 739,545 $ 589,152    
Non-current assets 3,822,266 3,390,465    
Current liabilities (844,937) (360,436)    
Non-current liabilities (1,178,343) (819,324)    
Total shareholders' equity, net 2,538,531 2,799,857 $ 2,968,200 $ 3,028,226
Shareholders of the parent 2,368,326 2,627,460    
Non-controlling interests 170,205 172,397 $ 196,678  
Sociedad Minera El Brocal S.A.A        
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]        
Current assets 190,658 166,396    
Non-current assets 504,173 553,754    
Current liabilities (158,745) (170,896)    
Non-current liabilities (168,774) (195,809)    
Total shareholders' equity, net 367,312 353,445    
Shareholders of the parent 218,520 208,944    
Non-controlling interests 148,792 144,501    
Minera La Zanja S.R.L. [Member]        
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]        
Current assets 84,953 104,076    
Non-current assets 41,490 30,486    
Current liabilities (25,381) (22,329)    
Non-current liabilities (61,150) (56,587)    
Total shareholders' equity, net 39,912 55,646    
Shareholders of the parent 19,848 29,525    
Non-controlling interests 20,064 26,121    
S.M.R.L. Chaupiloma Dos de Cajamarca        
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]        
Current assets 4,604 6,814    
Non-current assets 323 0    
Current liabilities (1,718) (2,694)    
Non-current liabilities 0 0    
Total shareholders' equity, net 3,209 4,120    
Shareholders of the parent 1,925 2,472    
Non-controlling interests 1,284 1,648    
Apu Coropuna S.R.L. [Member]        
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]        
Current assets 556 2,064    
Non-current assets 400 169    
Current liabilities 0 (1,071)    
Non-current liabilities (740) (740)    
Total shareholders' equity, net 216 422    
Shareholders of the parent 151 295    
Non-controlling interests $ 65 $ 127