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Derivative financial instruments - Narrative (Details)	12 Months Ended
	Dec. 31, 2024
Derivative financial instruments
Description of duration of hedging, financial assets	7 years

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- Definition

The description of duration of hedging financial assets.

+ References

No definition available.

+ Details

Name:	blx_DescriptionOfDurationOfHedgingFinancialAssets
Namespace Prefix:	blx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	blx_FinancialInstrumentAbstract
Namespace Prefix:	blx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration