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v3.19.1

Tax situation (Details 2) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 02, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |
Income (loss) before income tax |  | $ 22,475 | $ 92,545 | $ (255,237)
Peruvian statutory tax rate |  | 32.00% | 32.00% |
Income tax expense (income) |  | $ 22,502 | $ 12,797 | 46,710
Effect of change in income tax rate |  | 0 | 0 | (1,431)
Adjustment due to income tax rate applicable to la Quinua |  | 15,248 | (24,502) | (3,012)
Total income tax expense (benefit) |  | (26,926) | (18,012) | (53,504)
Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |
Income (loss) before income tax |  | $ (52,220) | $ (168,428) | $ (1,000,625)
Peruvian statutory tax rate | 29.50% | 29.50% | 29.50% | 28.00%
Income tax expense (income) |  | $ (15,405) | $ (49,686) | $ (280,175)
Valuation allowance on deferred tax asset |  | 23,771 | 50,960 | 386,763
Effect of change in income tax rate |  |  | 0 | (66,667)
Mining taxes |  | 6,260 | 3,530 | 7,392
Non-deductible expenses |  | 6,962 | 4,204 | 3,296
Adjustment due to income tax rate applicable to la Quinua |  | (176) | (124) | (1,024)
Income tax prior years refunds |  | 7,885 | (1,858) | (6,458)
Total income tax expense (benefit) |  | $ 29,297 | $ 7,026 | $ 43,127

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