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Transactions with associates companies (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Transactions with associates companies [Line Items]    
Trade receivables $ 206,032 $ 152,181
Other Receivables 154,404 291,919
Total trade and other receivables 351,075 435,137
Trade payables 194,757 234,117
Other payables 62 3
Total trade and other payables total 77 1,375
Associates [member]    
Disclosure Of Transactions with associates companies [Line Items]    
Trade and other receivable total 8,080 134,429
Trade and other receivables current 8,080 8,379
Trade and other receivables Non current 0 126,050
Total trade and other receivables 8,080 134,429
Minera Yanacocha S.R.L. [Member]    
Disclosure Of Transactions with associates companies [Line Items]    
Trade receivables 6,740 7,079
Trade payables 0 1,347
Compania Minera Coimolache S.A. [Member]    
Disclosure Of Transactions with associates companies [Line Items]    
Trade receivables 592 681
Trade payables 15 25
Other payables 42 3
Sociedad Minera Cerro Verde S.A.A. [Member]    
Disclosure Of Transactions with associates companies [Line Items]    
Trade receivables $ 16 $ 0