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Loans (Details 4) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | $ 6,686,244 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | [1] | $ 6,148,298 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | [1]
Argentina [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 184,882 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = stpr_AR |  | 189,828 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = stpr_AR |
Bolivia [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 10,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_BO |  | 0 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_BO |
Brazil [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 1,971,776 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_BR |  | 1,708,592 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_BR |
Chile [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 157,309 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_CL |  | 490,869 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_CL |
Colombia [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 726,085 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = stpr_CO |  | 701,577 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = stpr_CO |
Costa Rica [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 320,832 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_CR |  | 410,295 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_CR |
Dominican Republic [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 243,038 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_DO |  | 190,589 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_DO |
Ecuador [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 120,010 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_EC |  | 126,001 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_EC |
El Salvador [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 115,830 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_SV |  | 123,076 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_SV |
France [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 6,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_FR |  | 101,006 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_FR |
Germany [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 100,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = stpr_DE |  | 0 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = stpr_DE |
Guatemala [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 262,733 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_GT |  | 199,873 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_GT |
Honduras [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 93,008 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_HN |  | 73,524 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_HN |
Jamaica [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 15,512 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_JM |  | 60,784 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_JM |
Mexico [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 868,045 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_MX |  | 517,278 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_MX |
NETHERLANDS |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 10,455 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_NL |  | 14,867 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_NL |
Nicaragua [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 7,856 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_NI |  | 7,823 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_NI |
Panama [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 320,758 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = stpr_PA |  | 223,505 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = stpr_PA |
Paraguay [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 132,479 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_PY |  | 102,244 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_PY |
Peru [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 589,724 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_PE |  | 580,881 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_PE |
Switzerland [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 50,000 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_CH |  | 0 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_CH |
TRINIDAD AND TOBAGO |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 165,042 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_TT |  | 142,642 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_TT |
United States [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | 55,370 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_US |  | 28,283 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_US |
Uruguay [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans | $ 159,500 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_UY |  | $ 154,761 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_AllCountriesAxis = country_UY |
[1] | Current ratings as of December 31, 2014 and 2013, respectively.

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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