2.4.0.82409402 - Disclosure - Federal Home Loan Bank Advances - Additional Information (Details)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$D2012Q4YTDhttp://www.sec.gov/CIK0000737210duration2012-01-01T00:00:002012-12-31T00:00:00numberStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$I2013Q2http://www.sec.gov/CIK0000737210instant2013-06-30T00:00:000001-01-01T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3lnbb_SecuritiesPledgedAsCollateralLineItemslnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Securities Pledged As Collateral [Line Items]2false 4us-gaap_FederalHomeLoanBankAdvancesLongTermus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalsenetLabel1truefalsefalse4650800046508USD$falsetruefalse2truefalsefalse4660700046607USD$falsetruefalsexbrli:monetaryItemTypemonetaryIncluding both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 37 -IssueDate 2006-05-01 -Chapter 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 14 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 15, 18 -Chapter V -Subsection I -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64702-112823 false2Long-term Federal Home Loan Bank Advances3false 4us-gaap_LineOfCreditFacilityMaximumBorrowingCapacityus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse7221000072210USD$falsefalsefalsexbrli:monetaryItemTypemonetaryMaximum 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.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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 210.5-02.19(b),22(b)) -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, 22 -Article 5 false2Maximum borrowing capacity of the Bank4false 4lnbb_CashManagementLineOfCreditlnbb_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse4000000040000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCash management line of credit.No definition available.false2Cash management line of credit5false 4lnbb_PrepaymentsForFederalHomeLoanBankAdvanceslnbb_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse2750000027500USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryPrepayments For Federal Home Loan Bank AdvancesNo definition available.false2Prepayments For Federal Home Loan Bank Advances6false 4us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYearus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.02470.0247falsefalsefalse2falsefalsefalse00falsefalsefalsenum:percentItemTypepureThe calculated weighted average interest rate for Federal Home Loan Bank advances for the period ended as of the Balance Sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 14 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 17, 37 -IssueDate 2006-05-01 -Chapter 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false0Federal Home Loan Bank advances, average interest rate7false 4us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresWeightedAverageInterestRateus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.00880.0088falsefalsefalse2falsefalsefalse00falsefalsefalsenum:percentItemTypepureStates the weighted average interest rate applicable to the advances from the Federal Home Loan Bank outstanding as of the Balance Sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 17 -IssueDate 2006-05-01 -Chapter 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 14 -Subparagraph f, h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section VII -Subsection 1 false0Federal Home Loan Bank advances contractual average interest rate8false 4lnbb_FederalHomeLoanBankAdvancesPrepaymentPenaltylnbb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse10170001017USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryFederal Home Loan Bank, Advances, Prepayment PenaltyNo definition available.false2Deferred FHLB prepayment penalty9false 4lnbb_CashManagementLineOfCreditOutstandinglnbb_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCash management line of credit outstanding.No definition available.false2Cash Management Line Of Credit Outstanding10false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3false USDtruefalse$I2013Q2_us-gaap_FinancialInstrumentAxis_lnbb_MultiFamilyMortgageLoansMemberhttp://www.sec.gov/CIK0000737210instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseMulti-family mortgage loans [Member]us-gaap_FinancialInstrumentAxisxbrldihttp://xbrl.org/2006/xbrldilnbb_MultiFamilyMortgageLoansMemberus-gaap_FinancialInstrumentAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Multi-family mortgage loans [Member]11true 3lnbb_SecuritiesPledgedAsCollateralLineItemslnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Securities Pledged As Collateral [Line Items]12false 4us-gaap_DepositLiabilitiesCollateralIssuedFinancialInstrumentsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse8723000087230USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 14 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818 false2Investment securities13false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse4false USDtruefalse$I2013Q2_us-gaap_FinancialInstrumentAxis_lnbb_ResidentialRealEstateMortgageLoansMemberhttp://www.sec.gov/CIK0000737210instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseResidential real estate mortgage loans [Member]us-gaap_FinancialInstrumentAxisxbrldihttp://xbrl.org/2006/xbrldilnbb_ResidentialRealEstateMortgageLoansMemberus-gaap_FinancialInstrumentAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Residential real estate mortgage loans [Member]14true 3lnbb_SecuritiesPledgedAsCollateralLineItemslnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Securities Pledged As Collateral [Line Items]15false 4us-gaap_DepositLiabilitiesCollateralIssuedFinancialInstrumentsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse2173200021732USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 14 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818 false2Investment securities16false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse5false truefalseD2012Q4YTD_us-gaap_RangeAxis_us-gaap_MinimumMemberhttp://www.sec.gov/CIK0000737210duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMembernanafalse0Minimum [Member]17true 3lnbb_SecuritiesPledgedAsCollateralLineItemslnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Securities Pledged As Collateral [Line Items]18false 4lnbb_FederalHomeLoanBankAdvancesPrepaidDisclosuresRemainingMaturitylnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse0012 monthsfalsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaFederal Home Loan Bank, Advances, Prepaid, Disclosures, Remaining MaturityNo definition available.false0Federal Home Loan Bank advances remaining maturity19false 4lnbb_FederalHomeLoanBankAdvancesFixedRateDisclosuresRemainingMaturitylnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse0049 monthsfalsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaFederal Home Loan Bank, Advances, Fixed Rate, Disclosures, Remaining MaturityNo definition available.false0Federal Home Loan Bank advances, fixed rate, remaining maturity20false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse6false truefalseD2012Q4YTD_us-gaap_RangeAxis_us-gaap_MaximumMemberhttp://www.sec.gov/CIK0000737210duration2012-01-01T00:00:002012-12-31T00:00:00falsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMembernanafalse0Maximum [Member]21true 3lnbb_SecuritiesPledgedAsCollateralLineItemslnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Securities Pledged As Collateral [Line Items]22false 4lnbb_FederalHomeLoanBankAdvancesPrepaidDisclosuresRemainingMaturitylnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse0031 monthsfalsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaFederal Home Loan Bank, Advances, Prepaid, Disclosures, Remaining MaturityNo definition available.false0Federal Home Loan Bank advances remaining maturity23false 4lnbb_FederalHomeLoanBankAdvancesFixedRateDisclosuresRemainingMaturitylnbb_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse0067 monthsfalsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaFederal Home Loan Bank, Advances, Fixed Rate, Disclosures, Remaining MaturityNo definition available.false0Federal Home Loan Bank advances, fixed rate, remaining maturityfalseFederal Home Loan Bank Advances - Additional Information (Details) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.4lnb.com/role/FederalHomeLoanBankAdvancesAdditionalInformationDetails223