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Investments in associates and joint ventures (Details 2) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Disclosure of Investments in associates [Line Items] |  |  |  |
Current assets | $ 761,134 | $ 701,862 |  |
Non-current assets | 3,456,087 | 3,630,951 |  |
Current liabilities | (399,182) | (521,194) |  |
Non-current liabilities | (788,474) | (747,992) |  |
Shareholders' equity, reported | 3,029,565 | 3,063,627 | $ 3,047,213 | $ 3,389,236
Investments in associates | 1,473,382 | 1,536,887 | 1,536,607 |
Minera Yanacocha S.R.L. [Member] |  |  |  |
Disclosure of Investments in associates [Line Items] |  |  |  |
Current assets | 960,758 | 1,055,135 |  |
Non-current assets | 1,086,714 | 964,260 |  |
Current liabilities | (128,170) | (123,315) |  |
Non-current liabilities | (1,335,579) | (1,236,965) |  |
Shareholders' equity, reported | 583,723 | 659,115 |  |
Groups' interest (45.95% in 2017 and 43.65% in 2016) | 254,795 | 302,863 |  |
Goodwill | 16,241 | 21,998 |  |
Investments in associates | $ 0 | $ 0 | $ 0 |

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