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Transactions with associates companies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Royalty income | $ 20,385 | $ 20,739 | $ 24,339
Purchases of goods, related party transactions | 44 | 27 | 21
Revenue from rendering of services | 24,001 | 29,697 | 28,782
Interest income on loans and receivables | 92 | 1,685 | 4,164
Dividends paid to non-controlling shareholders | 5,560 | 6,036 | 7,400
Energy transmission [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Revenue from rendering of services | 393 | 559 | 0
Engineering service [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Revenue from rendering of services | 348 | 1,119 | 1,001
Operation and maintenance [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Revenue from rendering of services | 290 | 593 | 1,247
Administrative and Management services [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Revenue from rendering of services | 214 | 149 | 200
Constructions services [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Revenue from rendering of services | 0 | 1,332 | 1,152
Minera Yanacocha S.R.L. [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Dividends received and collected | 0 | 0 | 130,950
Compania Minera Coimolache S.A. [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Dividends received and collected | 7,623 | 9,823 | 11,390
Interest income on loans and receivables | 0 | 0 | 3
Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Dividends received and collected | 39,169 | 0 | 0
Interest income on loans and receivables | 0 | 1,685 | 4,161
Transportadora Callao SA [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Interest income on loans and receivables | 92 | 0 | 0
Newmont Peru Limited [Member] |  |  |
Disclosure Of Transactions with associates companies [Line Items] |  |  |
Dividends paid to non-controlling shareholders | $ 5,560 | $ 6,036 | $ 7,400

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