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Financial obligations (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Financial obligations [Abstract] |
Disclosure Of Detailed Information About Financial Obligation Explanatory [Text Block] |
| (a) | This caption is made up as follow:
|  | 2018 |  |  | 2017 |
|  | US$(000) |  |  | US$(000) |
Compañía de Minas Buenaventura S.A.A.(c) |  |  |  |  |  |  |  |
BBVA Banco Continental |  |  | 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 |  |  | (3,618 | ) |  |  | (2,425 | )
|  |  | 271,382 |  |  |  | 272,575 |
Sociedad Minera El Brocal S.A.A. |  |  |  |  |  |  |  |
Banco de Crédito del Perú – Finance leaseback |  |  | 94,490 |  |  |  | 119,464 |
Debt issuance costs |  |  | (976 | ) |  |  | (1,377 | )
|  |  | 93,514 |  |  |  | 118,087 |
Mid-term financial obligation |  |  | 75,000 |  |  |  | 80,000 |
|  |  | 168,514 |  |  |  | 198,087 |
Empresa de Generación Huanza S.A. |  |  |  |  |  |  |  |
Banco de Crédito del Perú – Finance lease |  |  | 147,166 |  |  |  | 162,411 |
Contacto Corredores de Seguros S.A. |  |  |  |  |  |  |  |
BBVA Banco Continental S.A. – Finance lease |  |  | - |  |  |  | 10 |
Total financial obligations |  |  | 587,062 |  |  |  | 633,083 |
Classification by maturity: |  |  |  |  |  |  |  |
Current portion |  |  | 46,166 |  |  |  | 83,991 |
Non-current portion (e) |  |  | 540,896 |  |  |  | 549,092 |
Total financial obligations |  |  | 587,062 |  |  |  | 633,083 |
Disclosure of maturity analysis for non-derivative financial liabilities [text block] |
| (e) | The long-term portion of the financial obligations held by the Group matures as follows:
|  | 2018 |  |  | 2017 |
|  | US$(000) |  |  | US$(000) |
Between 1 and 2 years |  |  | 278,397 |  |  |  | 125,215 |
Between 2 and 5 years |  |  | 266,625 |  |  |  | 427,680 |
|  |  | 545,022 |  |  |  | 552,895 |
Debt issuance costs |  |  | (4,126 | ) |  |  | (3,803 | )
|  |  | 540,896 |  |  |  | 549,092 |
Disclosure of reconciliation of liabilities arising from financing activities [text block] |
| (f) | Below is presented the movement:
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | US$(000) |  |  | US$(000) |  |  | US$(000) |
Beginning balance |  |  | 633,083 |  |  |  | 592,342 |  |  |  | 353,710 |
Accrual of debt issuance costs in results, note 27(a) |  |  | 1,024 |  |  |  | 909 |  |  |  | - |
Payments |  |  | (45,222 | ) |  |  | (32,599 | ) |  |  | (33,476 | )
Increase in interest for debt restructuring |  |  | (2,207 | ) |  |  | - |  |  |  | - |
Exchange difference |  |  | 384 |  |  |  | (165 | ) |  |  | 17 |
New obligations |  |  | - |  |  |  | 80,000 |  |  |  | 275,210 |
Accrual of debt issuance costs capitalized |  |  | - |  |  |  | 272 |  |  |  | (3,119 | )
Sale of asset under lease agreement |  |  | - |  |  |  | (7,196 | ) |  |  | - |
Increase of debt issuance costs, note 27(a) |  |  | - |  |  |  | (480 | ) |  |  | - |
Final balance |  |  | 587,062 |  |  |  | 633,083 |  |  |  | 592,342 |

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