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Long-term borrowings and debt (Details Textual) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Euro Medium Term Note Program [Member] |
Long Term Debt [Line Items] |
Maximum amount that can be raised | $ 2,300 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = blx_EuroMediumTermNoteProgramMember
Debt Instrument, Description | Euro Medium Term Note Program (“EMTN”), which may be used to issue notes for up to $2.3 billion, with maturities from 7 days up to a maximum of 30 years, at fixed or floating interest rates, or at discount, and in various currencies. The notes are generally issued in bearer or registered form through one or more authorized financial institutions;
Certificados Bursatiles Program [Member] |
Long Term Debt [Line Items] |
Maximum amount that can be raised | 10,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = blx_CertificadosBursatilesProgramMember
Debt Instrument, Description | Short-and Long-Term Notes “Certificados Bursatiles” Program (the “Mexico Program”) in the Mexican local market, registered with the Mexican National Registry of Securities maintained by the National Banking and Securities Commission in Mexico (“CNBV”, for its acronym in Spanish), for an authorized aggregate principal amount of 10 billion Mexican pesos with maturities from one day to 30 years;
Corporate Bonds [Member] |
Long Term Debt [Line Items] |
Maximum amount that can be raised | $ 300 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = blx_CorporateBondsMember
Debt Instrument, Description | a Program in Peru to issue corporate bonds under a private offer in Peruvian nuevos soles (“PEN”), offered exclusively to institutional investors domiciled in the Republic of Peru, for an maximum aggregate limit of the equivalent of $300 million, with different maturities and interest rate structures.

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- Definition Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Balance Type: | credit
Period Type: | instant

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