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Administrative expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | $ 78,760 | $ 83,597 | $ 81,692
Minera Yanacocha SRL and subsidiary [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 2,783 | 4,760 | 8,780
Management expenses [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,317 | 3,395 | 7,191
Others [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,466 | 1,365 | 1,589
Personnel expenses |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 34,656 | 36,265 | 29,617
Professional fees |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 15,324 | 12,663 | 11,696
Sundry charges |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 7,450 | 10,375 | 15,295
Rentals |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 5,818 | 5,412 | 4,870
Board of Directors' participation |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 3,252 | 1,422 | 1,140
Maintenance and repairs |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 2,732 | 2,657 | 1,076
Subscriptions and quotes |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,938 | 1,428 | 697
Donations |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,617 | 3,006 | 4,280
Communications |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,512 | 1,376 | 1,557
Depreciation and amortization |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,295 | 1,146 | 254
Transport |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,212 | 989 | 310
Insurance |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 645 | 3,911 | 3,023
Travel and mobility |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 467 | 1,053 | 914
Consumption of materials and supplies |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 436 | 616 | 416
Canons and tributes. |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 388 | 602 | 1,460
Allowance for doubtful accounts |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | $ 18 | $ 676 | $ 5,087

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