Estimated Fair Value of Financial Instruments (Details Textual) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Estimated Fair Value of Financial Instruments (Textual) [Abstract]
Fair value of deposits with stated maturity
Amount of collateral dependent impaired loans minimum considered to be material	$ 250,000

Amount of collateral dependent impaired loans minimum considered to be material.

No definition available.

Name:	lnbb_AmountOfCollateralDependentImpairedLoansMinimumConsideredToBeMaterial
Namespace Prefix:	lnbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant