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Applicable laws and regulations - Schedule of provision and reserve (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Statement [Line Items] |  |
Statutory reserve | $ 136,019 | $ 136,019

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- Definition Classification Of Loans + References No definition available. + Details
Name: | blx_ClassificationOfLoansLineItems
Namespace Prefix: | blx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition A component of equity representing reserves created based on legal requirements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_StatutoryReserve
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant