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Financial obligations (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Financial obligations [Abstract] |
Disclosure Of Detailed Information About Financial Obligation Explanatory [Text Block] |
| (a) | This caption is made up as follow:
|  | 2017 |  | 2016 |
|  | US$(000) |  | US$(000) |
Compañía de Minas Buenaventura S.A.A. (b) |  |  |  |  |  |  |
BBVA Banco Continental S.A. |  |  | 61,667 |  |  | 61,667 |
Banco de Crédito del Perú |  |  | 61,667 |  |  | 61,667 |
CorpBanca New York Branch |  |  | 61,666 |  |  | 61,666 |
Banco Internacional del Perú |  |  | 30,000 |  |  | 30,000 |
ICBC Perú Bank |  |  | 25,000 |  |  | 25,000 |
Banco Latinoamericano de Comercio Exterior S.A. |  |  | 20,000 |  |  | 20,000 |
Banco de Sabadell, Miami Branch |  |  | 15,000 |  |  | 15,000 |
|  |  | 275,000 |  |  | 275,000 |
Debt issuance costs |  |  | (2,425) |  |  | (3,119) |
|  |  | 272,575 |  |  | 271,881 |
Sociedad Minera El Brocal S.A.A. |  |  |  |  |  |  |
Banco de Crédito del Perú – Finance leaseback (c) |  |  | 119,464 |  |  | 136,812 |
Debt issuance costs |  |  | (1,377) |  |  | - |
|  |  | 118,087 |  |  | 136,812 |
Mid-term financial obligation (c) |  |  | 80,000 |  |  | 173 |
|  |  | 198,087 |  |  | 136,985 |
Empresa de Generación Huanza S.A. |  |  |  |  |  |  |
Banco de Crédito del Perú – Finance lease (d) |  |  | 162,411 |  |  | 176,062 |
Contacto Corredores de Seguros S.A. |  |  |  |  |  |  |
BBVA Banco Continental S.A. – Finance lease |  |  | 10 |  |  | 53 |
Buenaventura Ingenieros S.A. |  |  |  |  |  |  |
Banco de Crédito del Perú – Finance lease (e) |  |  | - |  |  | 7,361 |
Total financial obligations |  |  | 633,083 |  |  | 592,342 |
Classification by maturity: |  |  |  |  |  |  |
Current portion |  |  | 83,991 |  |  | 40,110 |
Non-current portion (f) |  |  | 549,092 |  |  | 552,232 |
Total financial obligations |  |  | 633,083 |  |  | 592,342 |
Disclosure of maturity analysis for non-derivative financial liabilities [text block] |
| (f) | The long-term portion of the financial obligations held by the Group matures as follows:
|  | 2017 |  | 2016 |
|  | US$(000) |  | US$(000) |
Between 1 and 2 years |  |  | 125,215 |  |  | 81,057 |
Between 2 and 5 years |  |  | 427,680 |  |  | 474,294 |
|  |  | 552,895 |  |  | 555,351 |
Debt issuance costs |  |  | (3,803) |  |  | (3,119) |
|  |  | 549,092 |  |  | 552,232 |
Disclosure of reconciliation of liabilities arising from financing activities [text block] |
| (g) | Below is presented the movement:
|  | 2017 |  | 2016 |  | 2015 |
|  | US$(000) |  | US$(000) |  | US$(000) |
Beginning balance |  |  | 592,342 |  |  | 353,710 |  |  | 383,305 |
New obligations |  |  | 80,000 |  |  | 275,210 |  |  | 296 |
Accrual of debt issuance costs capitalized |  |  | 272 |  |  | (3,119) |  |  | - |
Accrual of debt issuance costs in results, note 26(a) |  |  | 909 |  |  | - |  |  | - |
Payments |  |  | (32,599) |  |  | (33,476) |  |  | (29,891) |
Sale of asset under lease agreement (e) |  |  | (7,196) |  |  | - |  |  | - |
Increase of debt issuance costs, note 26(a) |  |  | (480) |  |  | - |  |  | - |
Exchange difference |  |  | (165) |  |  | 17 |  |  | - |
Final balance |  |  | 633,083 |  |  | 592,342 |  |  | 353,710 |

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