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Subsidiaries with material non-controlling interest - Statements of profit or loss (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]      
Sales of goods $ 900,450 $ 676,542 $ 867,888
Net loss (262,804) (150,339) (28,459)
Attributable to non-controlling interests 1,271 (14,621) (16,251)
Sociedad Minera El Brocal S.A.A      
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]      
Sales of goods 410,390 255,275 299,252
Net loss 10,562 (31,541) (32,855)
Attributable to non-controlling interests 4,322 (12,895) (13,432)
Minera La Zanja S.R.L. [Member]      
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]      
Sales of goods 39,380 33,033 43,520
Net loss (10,218) (14,712) (19,364)
Attributable to non-controlling interests (7,385) (6,905) (9,090)
S.M.R.L. Chaupiloma Dos de Cajamarca      
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]      
Sales of goods 15,928 18,638 22,297
Net loss 10,989 13,004 15,715
Attributable to non-controlling interests 4,396 5,201 6,286
Apu Coropuna S.R.L. [Member]      
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]      
Sales of goods 0 0 0
Net loss (206) (44) (48)
Attributable to non-controlling interests (62) (22) (14)
Other minor subsidiaries [Member]      
Disclosure Of Subsidiaries with material non-controlling interest [Line Items]      
Sales of goods 0 0 0
Net loss 0 0 (17)
Attributable to non-controlling interests $ 0 $ 0 $ (1)