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v3.22.1

New accounting standards - Narrative (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of detailed information about hedges [line items] |  |
Nominal value | $ 943,931 | $ 783,017

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- Definition Nominal amount of hedging instrument + References No definition available. + Details
Name: | blx_NominalAmountOfHedgingInstrument1
Namespace Prefix: | blx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfHedgeAccountingLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration