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Financial instruments with off-balance sheet credit risk (Details 2) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | $ 480,423 | $ 234,876
Argentina [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 295 | 0
Bolivia [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 80 | 820
Brazil [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 22,567 | 23,630
Chile [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 0 | 6,084
Colombia [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 38,545 | 9,098
Costa Rica [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 897 | 1,000
Dominican Republic [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 108 | 1,535
Ecuador [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 153,072 | 79,760
El Salvador [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 25 | 625
Guatemala [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 43,548 | 180
Honduras [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 412 | 562
Jamaica [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 338 | 0
Mexico [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 20,969 | 27,289
Netherlands [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 17,833 | 0
Panama [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 96,943 | 58,219
Paraguay [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 2 | 0
Peru [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 41,063 | 2,843
Switzerland [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 1,000 | 0
United Kingdom [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 70 | 0
Uruguay [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | 40,946 | 0
Venezuela [Member] |  |
Off-balance Sheet Risks [Line Items] |  |
Financial Instruments With Off-Balance Sheet Credit Risk | $ 1,710 | $ 23,231

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- Definition The total amount of instruments with off-balance sheet credit risk at the reporting date. + References No definition available. + Details
Name: | blx_FinancialInstrumentsWithOffBalanceSheetCreditRisk
Namespace Prefix: | blx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | blx_OffbalanceSheetRisksLineItems
Namespace Prefix: | blx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration