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Net sales (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Net sales [Abstract] |
Disclosure of detailed information about net sales and services rendered [Text Block] | The table below presents the net sales to customers by geographic region and product type:
|  | 2017 |  | 2016 |  | 2015 |
|  | US$(000) |  | US$(000) |  | US$(000) |
Sales and services by geographic region: |  |  |  |  |  |  |  |  |  |
Metal and concentrates sales |  |  |  |  |  |  |  |  |  |
Peru |  |  | 591,185 |  |  | 401,372 |  |  | 345,146 |
America |  |  | 464,000 |  |  | 410,154 |  |  | 419,359 |
Europe |  |  | 91,414 |  |  | 109,788 |  |  | 60,549 |
Asia |  |  | 77,343 |  |  | 94,356 |  |  | 21,215 |
|  |  | 1,223,942 |  |  | 1,015,670 |  |  | 846,269 |
Services rendered |  |  |  |  |  |  |  |  |  |
Peru |  |  | 14,903 |  |  | 28,782 |  |  | 50,839 |
America |  |  | 14,794 |  |  | - |  |  | - |
|  |  | 29,697 |  |  | 28,782 |  |  | 50,839 |
|  |  | 1,253,639 |  |  | 1,044,452 |  |  | 897,108 |
Sale by metal: |  |  |  |  |  |  |  |  |  |
Gold |  |  | 511,434 |  |  | 440,603 |  |  | 419,541 |
Silver |  |  | 409,775 |  |  | 385,989 |  |  | 313,418 |
Copper |  |  | 268,527 |  |  | 224,649 |  |  | 131,356 |
Zinc |  |  | 188,023 |  |  | 142,425 |  |  | 102,110 |
Lead |  |  | 94,955 |  |  | 58,690 |  |  | 55,445 |
Manganese sulfate |  |  | 6,317 |  |  | 5,982 |  |  | 3,649 |
Indium |  |  | 66 |  |  | - |  |  | - |
|  |  | 1,479,097 |  |  | 1,258,338 |  |  | 1,025,519 |
Commercial deductions |  |  | (253,939) |  |  | (244,414) |  |  | (196,145) |
Adjustments to prior period liquidations |  |  | 919 |  |  | 4,611 |  |  | 7,467 |
Embedded derivatives from sale of concentrate |  |  | 8,786 |  |  | 880 |  |  | (388) |
Hedge operations |  |  | (10,921) |  |  | (3,745) |  |  | 9,816 |
|  |  | 1,223,942 |  |  | 1,015,670 |  |  | 846,269 |
Services rendered |  |  | 29,697 |  |  | 28,782 |  |  | 50,839 |
|  |  | 1,253,639 |  |  | 1,044,452 |  |  | 897,108 |

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Namespace Prefix: | cik0001013131_
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- References No definition available. + Details
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