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Deposits - Schedule of Additional Information Regarding the Bank's Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deposits
Aggregate amount of $100,000 or more	$ 5,411,881	$ 4,407,608
Aggregate amount of deposits in the New York Agency	1,581,865	1,250,524
Interest expense on deposits made in the New York Agency	$ 88,668	$ 53,885	$ 12,334

X

- Definition

The aggregate amounts of deposits in New York Agency.

+ References

No definition available.

+ Details

Name:	blx_AggregateAmountsOfDepositsInNewYorkAgency
Namespace Prefix:	blx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Definition

The amount of interest expense paid to deposits in the new york agency.

+ References

No definition available.

+ Details

Name:	blx_InterestExpensePaidToDepositsInNewYorkAgency
Namespace Prefix:	blx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more.

+ References

No definition available.

+ Details

Name:	blx_TimeDeposits100000OrMoreFromCustomer
Namespace Prefix:	blx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant