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Administrative expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | $ 83,597 | $ 81,692 | $ 84,372
Minera Yanacocha SRL and subsidiary [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 4,760 | 8,780 | 20,028
Management expenses [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 3,395 | 7,191 | 18,108
Others [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,365 | 1,589 | 1,920
Personnel expenses |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 36,265 | 29,617 | 33,036
Sundry charges |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 12,510 | 15,531 | 21,248
Professional fees |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 12,663 | 11,696 | 10,364
Rentals |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 5,412 | 4,870 | 4,009
Donations |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 3,006 | 4,280 | 3,336
Insurance |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 3,911 | 3,023 | 5,105
Allowance for doubtful accounts |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 676 | 5,087 | 903
Communications |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,376 | 1,557 | 1,281
Canons and tributes. |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 602 | 1,460 | 824
Maintenance and repairs |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 2,657 | 1,076 | 973
Board of Directors’ participation |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,422 | 1,140 | 1,055
Travel and mobility |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,053 | 914 | 787
Subscriptions and quotes |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 1,428 | 697 | 540
Consumption of materials and supplies |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | 616 | 416 | 1,032
Provision (reversal) of stock appreciation’s rights |  |  |
Disclosure of administrative expense [Line Items] |  |  |
Administrative expenses | $ 0 | $ 328 | $ (121)

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