XML 146 R132.htm IDEA: XBRL DOCUMENT
v3.19.1

Trade and other receivables, net (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of Trade and other receivables, net [Line Items] |  |  |
Beginning balance | $ 2,372 | $ 2,087 | $ 0
Increase in restricted bank accounts | 410 | 285 | 2,087
Final balance | $ 2,782 | $ 2,372 | $ 2,087

X
- Definition The Beginning balance of Restricted bank + References No definition available. + Details
Name: | cik0001013131_BeginningBalanceOfRestrictedBankAccounts
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | cik0001013131_DisclosureOfTradeAndOtherReceivablesNetLineItems
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase decrease in restricted bank accounts + References No definition available. + Details
Name: | cik0001013131_IncreaseInRestrictedBankAccounts
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration