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Investment funds (Details Textual) | Dec. 31, 2013
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Bladex Offshore Feeder Fund [Member] |
Schedule of Investments [Line Items] |
Interest Percentage In Investments Funds | 98.74%
Alpha 4X Feeder Fund [Member] |
Schedule of Investments [Line Items] |
Equity Participation In Percentage | 55.87%
Bladex Latam Fund [Member] |
Schedule of Investments [Line Items] |
Interest Percentage In Investments Funds | 92.38%

X
- Definition Represents the participation percentage on equity investments to be accounted for under the equity method. + References No definition available. + Details
Name: | blx_EquityParticipationInPercentage
Namespace Prefix: | blx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the value of interest percentage in investments funds for during period. + References No definition available. + Details
Name: | blx_InterestPercentageInInvestmentsFunds
Namespace Prefix: | blx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration