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Document And Entity Information
 12 Months Ended
Dec. 31, 2014
Document Information [Line Items]  
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2014
Document Fiscal Year Focus 2014
Document Fiscal Period Focus FY
Entity Registrant Name FOREIGN TRADE BANK OF LATIN AMERICA, INC.
Entity Central Index Key 0000890541
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Trading Symbol BLX
Common Stock [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 38,777,339dei_EntityCommonStockSharesOutstanding
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Common Class A [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 6,342,189dei_EntityCommonStockSharesOutstanding
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= us-gaap_CommonClassAMember
Common Class B [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 2,479,050dei_EntityCommonStockSharesOutstanding
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= us-gaap_CommonClassBMember
Common Class E [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 29,956,100dei_EntityCommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= blx_CommonClassEMember
Common Class F [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 0dei_EntityCommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= blx_CommonClassFMember