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Loans (Details 9) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 6,686,244us-gaap_LoansAndLeasesReceivableGrossCarryingAmount	[1]	$ 6,148,298us-gaap_LoansAndLeasesReceivableGrossCarryingAmount	[1]
Past Due Balances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,034us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember
Current Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,677,409us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember		6,145,173us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember
Delinquent Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,801us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember		3,125us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember
Days (91-120) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	909us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember
Days (121-150) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember
Days (151-180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember
Days (Greater Than 180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,125us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember
Corporation [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,831,960us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember		3,314,056us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember
Corporation [Member] | Past Due Balances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,125us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember
Corporation [Member] | Current Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,824,034us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember		3,310,931us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember
Corporation [Member] | Delinquent Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,801us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember		3,125us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember
Corporation [Member] | Days (91-120) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember
Corporation [Member] | Days (121-150) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember
Corporation [Member] | Days (151-180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember
Corporation [Member] | Days (Greater Than 180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,125us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_CorporationMember / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember
Banking and Financial Institutions [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,370,936us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember		2,259,991us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember
Banking and Financial Institutions [Member] | Past Due Balances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember
Banking and Financial Institutions [Member] | Current Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,370,936us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember		2,259,991us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember
Banking and Financial Institutions [Member] | Delinquent Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember
Banking and Financial Institutions [Member] | Days (91-120) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember
Banking and Financial Institutions [Member] | Days (121-150) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember
Banking and Financial Institutions [Member] | Days (151-180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember
Banking and Financial Institutions [Member] | Days (Greater Than 180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_BankingandFinancialInstitutionsMember / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember
Middle Market Companies [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	483,348us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember		574,107us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember
Middle Market Companies [Member] | Past Due Balances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	909us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember
Middle Market Companies [Member] | Current Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	482,439us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember		574,107us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember
Middle Market Companies [Member] | Delinquent Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember
Middle Market Companies [Member] | Days (91-120) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	909us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember
Middle Market Companies [Member] | Days (121-150) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember
Middle Market Companies [Member] | Days (151-180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember
Middle Market Companies [Member] | Days (Greater Than 180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_MiddleMarketCompaniesMember / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember
Sovereign [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember	[1]	144us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember	[1]
Sovereign [Member] | Past Due Balances [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_PastDueBalancesMember
Sovereign [Member] | Current Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember		144us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_CurrentLoanMember
Sovereign [Member] | Delinquent Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = blx_DelinquentLoansMember
Sovereign [Member] | Days (91-120) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / blx_LoanMaturitiesAxis = blx_NinetyOneToHundredAndTwentyDaysMember
Sovereign [Member] | Days (121-150) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / blx_LoanMaturitiesAxis = blx_HundredAndTwentyOneToHundredAndFiftyDaysMember
Sovereign [Member] | Days (151-180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember		0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / blx_LoanMaturitiesAxis = blx_HundredAndFiftyOneToHundredAndEightyDaysMember
Sovereign [Member] | Days (Greater Than 180) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember		$ 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = blx_SovereignMember / blx_LoanMaturitiesAxis = blx_GreaterThanHundredAndEightyDaysMember
[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

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