Cash management line of credit.

No definition available.

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Namespace Prefix:	lnbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cash management line of credit outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	lnbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Federal Home Loan Bank, Advances, Fixed Rate, Disclosures, Remaining Maturity

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Federal Home Loan Bank, Advances, Prepaid, Disclosures, Remaining Maturity

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Federal Home Loan Bank, Advances, Prepayment Penalty

+ References

No definition available.

+ Details

Name:	lnbb_FederalHomeLoanBankAdvancesPrepaymentPenalty
Namespace Prefix:	lnbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Prepayments For Federal Home Loan Bank Advances

+ References

No definition available.

+ Details

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Namespace Prefix:	lnbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

+ References

Reference 1: 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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The calculated weighted average interest rate for Federal Home Loan Bank advances for the period ended as of the Balance Sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.13(3)(a))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Period Type:	duration

- Definition

States the weighted average interest rate applicable to the advances from the Federal Home Loan Bank outstanding as of the Balance Sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

-Number 3

-Section VII

-Subsection 1

+ Details

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- Definition

Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

+ References

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 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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 4: 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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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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Namespace Prefix:	us-gaap_
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Period Type:	instant

Federal Home Loan Bank Advances - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Mar. 31, 2014	Dec. 31, 2013
Securities Pledged As Collateral [Line Items]
Long-term Federal Home Loan Bank Advances		$ 46,760,000	$ 46,708,000
Maximum borrowing capacity of the Bank		73,971,000
Cash management line of credit		40,000,000
Prepayments For Federal Home Loan Bank Advances	27,500,000
Federal Home Loan Bank advances, average interest rate	2.47%
Federal Home Loan Bank advances contractual average interest rate	0.88%
Deferred FHLB prepayment penalty	1,017,000
Cash Management Line Of Credit Outstanding		0	0
Multi-family mortgage loans [Member]
Securities Pledged As Collateral [Line Items]
Investment securities		88,238,000
Residential real estate mortgage loans [Member]
Securities Pledged As Collateral [Line Items]
Investment securities		$ 16,985,000
Minimum [Member]
Securities Pledged As Collateral [Line Items]
Federal Home Loan Bank advances remaining maturity	12 months
Federal Home Loan Bank advances, fixed rate, remaining maturity	49 months
Maximum [Member]
Securities Pledged As Collateral [Line Items]
Federal Home Loan Bank advances remaining maturity	31 months
Federal Home Loan Bank advances, fixed rate, remaining maturity	67 months