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Federal Home Loan Bank Advances - Maturities of FHLB Advances Outstanding (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Maturities of FHLB advances outstanding    
Federal Home Loan Bank advances amount $ 46,974us-gaap_FederalHomeLoanBankAdvancesLongTerm $ 54,321us-gaap_FederalHomeLoanBankAdvancesLongTerm
Restructuring prepayment penalty (526)lnbb_FederalHomeLoanBankAdvancesRestructuringPrepaymentPenalty (579)lnbb_FederalHomeLoanBankAdvancesRestructuringPrepaymentPenalty
Maturities January 2014 with fixed rate 3.55% [Member]    
Maturities of FHLB advances outstanding    
Interest rates on Federal Home Loan Bank Advances 3.55%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturitiesDueJanuaryTwoThousandFourteenMember		  
Maturities January 2015 with fixed rate 0.80% [Member]    
Maturities of FHLB advances outstanding    
Interest rates on Federal Home Loan Bank Advances 0.80%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturitiesDueJanuaryTwoThousandFifteenMember		  
Federal Home Loan Bank advances amount 0us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturitiesDueJanuaryTwoThousandFifteenMember		 20,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturitiesDueJanuaryTwoThousandFifteenMember
Maturity March 2015 with fixed rate of 0.24% [Member]    
Maturities of FHLB advances outstanding    
Interest rates on Federal Home Loan Bank Advances 0.24%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueMarchTwoThousandFifteenMember		  
Federal Home Loan Bank advances amount 0us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueMarchTwoThousandFifteenMember		 7,400us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueMarchTwoThousandFifteenMember
Maturity December 2016 with fixed rate 0.79% [Member]    
Maturities of FHLB advances outstanding    
Interest rates on Federal Home Loan Bank Advances 0.79%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueInDecemberThousandSixteenMember		  
Federal Home Loan Bank advances amount 10,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueInDecemberThousandSixteenMember		 10,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueInDecemberThousandSixteenMember
Maturity January 2017 with a variable rate of 0.42% [Member]    
Maturities of FHLB advances outstanding    
Interest rates on Federal Home Loan Bank Advances 0.42%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityJanuaryTwoThousandSeventeenMember		  
Federal Home Loan Bank advances amount 20,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityJanuaryTwoThousandSeventeenMember		 0us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityJanuaryTwoThousandSeventeenMember
Maturity June 2017 through December 2017, with fixed rates ranging from 0.89% to 0.99% [Member]    
Maturities of FHLB advances outstanding    
Federal Home Loan Bank advances amount 15,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueJuneTwoThousandSeventeenThroughDecemberTwoThousandSeventeenMember		 15,000us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueJuneTwoThousandSeventeenThroughDecemberTwoThousandSeventeenMember
Maturity June 2017 through December 2017, with fixed rates ranging from 0.89% to 0.99% [Member] | Minimum [Member]    
Maturities of FHLB advances outstanding    
Interest rates on Federal Home Loan Bank Advances 0.89%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueJuneTwoThousandSeventeenThroughDecemberTwoThousandSeventeenMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Maturity June 2017 through December 2017, with fixed rates ranging from 0.89% to 0.99% [Member] | Maximum [Member]    
Maturities of FHLB advances outstanding    
Interest rates on Federal Home Loan Bank Advances 0.99%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueJuneTwoThousandSeventeenThroughDecemberTwoThousandSeventeenMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Maturity June 2018 fixed rate 1.24% [Member]    
Maturities of FHLB advances outstanding    
Interest rates on Federal Home Loan Bank Advances 1.24%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueJuneTwoThousandEighteenMember		  
Federal Home Loan Bank advances amount $ 2,500us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueJuneTwoThousandEighteenMember		 $ 2,500us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ lnbb_AdvancesFromFederalHomeLoanBanksByMaturityPeriodAxis
= lnbb_MaturityDueJuneTwoThousandEighteenMember