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

The increase (decrease) in equity as a result of an increase in a designated risk component that was reasonably possible at the end of the reporting period. Excludes defined benefit plan obligations.

No definition available.

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

Increase (Decrease) In Equity Value Due To Reasonably Possible Decrease In Designated Risk Component

No definition available.

Name:	blx_IncreaseDecreaseInEquityValueDueToReasonablyPossibleDecreaseInDesignatedRiskComponent
Namespace Prefix:	blx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Increase (Decrease) In Equity Value Due To Reasonably Possible Increase In Designated Risk Component

No definition available.

Name:	blx_IncreaseDecreaseInEquityValueDueToReasonablyPossibleIncreaseInDesignatedRiskComponent
Namespace Prefix:	blx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The increase (decrease) in profit and loss as a result of an decrease in a designated risk component that was reasonably possible at the end of the reporting period. Excludes defined benefit plan obligations.

No definition available.

Name:	blx_IncreaseDecreaseInProfitAndLossDueToReasonablyPossibleDecreaseInDesignatedRiskComponent
Namespace Prefix:	blx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The increase (decrease) in profit and loss as a result of an increase in a designated risk component that was reasonably possible at the end of the reporting period. Excludes defined benefit plan obligations.

No definition available.

Name:	blx_IncreaseDecreaseInProfitAndLossDueToReasonablyPossibleIncreaseInDesignatedRiskComponent
Namespace Prefix:	blx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

No definition available.