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Commitments and contingencies (Details 3) - Minera Yanacocha SRL and subsidiary [member] - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Letters of guarantee outstanding, amount |  | $ 539,251 | $ 503,729
BBVA Continental [member] |  |  |
Letters of guarantee outstanding, amount |  | 190,000 | 190,000
Banco de Credito del Peru [member] |  |  |
Letters of guarantee outstanding, amount | [1] | 114,251 | 123,729
Scotiabank [member] |  |  |
Letters of guarantee outstanding, amount |  | $ 235,000 | $ 190,000
[1] | Letters of guarantee of Banco de Credito del Peru include US$6,321,000 related to San Jose Reservoir Trust in 2017. In 2018 letters of guarantee were not required.

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- Definition The outstanding amount of letters of credit showed by the entity in accordance with the Mine Closure Regulation. + References No definition available. + Details
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- Details
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