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Other accruals and liabilities - Caption (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure Of Other Accruals And Liabilities [Line Items] |  |
Lease liabilities | $ 7,839 | $ 7,503
Minera Yanacocha SRL and subsidiary [Member] |  |
Disclosure Of Other Accruals And Liabilities [Line Items] |  |
Accrual of capital expenditure | 20,147 | 8,139
Workers' profit sharing payable (b) | 17,311 | 12,793
Interests payable, see note 23 | 16,840 | 16,840
Accrual of operating costs (c) | 15,938 | 11,238
Lease liabilities | 330 | 596
Total | 70,566 | 49,606
Classification by maturity: |  |
Current portion | 70,526 | 49,301
Non-current portion | 40 | 305
Total | $ 70,566 | $ 49,606

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