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Other accounts payable (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of other accounts payable [Abstract] |  |  |
Mining royalties | $ 31,217 | $ 27,611 | $ 27,188
Interest and penalties | $ 21,200 |  |

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- References No definition available. + Details
Name: | cik0001013131_DisclosureOfOtherAccountsPayableAbstract
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of interest and penalties which included in other accounts payable. + References No definition available. + Details
Name: | cik0001013131_InterestAndPenalties
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Royalty expense incurred and are directly related to goods produced and sold and services rendered during the reporting period. + References No definition available. + Details
Name: | cik0001013131_MiningRoyalties
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration