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Related party transactions - Schedule of reporting periods, total compensation paid to directors and the executives of bladex (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Related party transactions |  |  |
Compensation costs to directors | $ 1,910 | $ 1,853 | $ 1,877
Compensation costs to executives | $ 8,067 | $ 4,302 | $ 4,083

X
- Definition The amount of compensation cost paid to directors. + References No definition available. + Details
Name: | blx_CompensationCostPaidToDirectors
Namespace Prefix: | blx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of compensation cost paid to executives. + References No definition available. + Details
Name: | blx_CompensationCostPaidToExecutives
Namespace Prefix: | blx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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