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Other assets (Details Textual) $ in Millions	Dec. 31, 2017 USD ($)
Disclosure of other assets [Abstract]
Leasing Property Under Development	$ 1.7

X

- References

No definition available.

+ Details

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

X

- Definition

The amount of leasing properties representing such assets under development.

+ References

No definition available.

+ Details

Name:	blx_LeasingPropertyUnderDevelopment
Namespace Prefix:	blx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant