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Summary of Significant Accounting Policies - Additional Items (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 1 Months Ended 3 Months Ended
Dec. 31, 2014
Mar. 31, 2015
Dec. 15, 2014
Accounting Policies [Abstract]      
Merge Agreement Percentage of Shares to be Converted into Shares of Surviving Entity     50.00%lnbb_MergeAgreementPercentageofSharestobeConvertedintoSharesofSurvivingEntity
Merger Agreement, Percentage of Shares to be Exchanged for Cash     50.00%lnbb_MergerAgreementPercentageofSharestobeExchangedforCash
Common Stock, Conversion Ratio     1.461lnbb_CommonStockConversionRatio
Common Stock, Conversion Ratio (in USD per Share)     $ 18.70lnbb_CommonStockConversionRatioinUSDperShare
Merger Agreement, Merger Related Expenses $ 752lnbb_MergerAgreementMergerRelatedExpenses    
Merger Agreement, Merger Related Expenses, Net of Tax $ 567lnbb_MergerAgreementMergerRelatedExpensesNetofTax $ 130lnbb_MergerAgreementMergerRelatedExpensesNetofTax