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BASIS OF PRESENTATION (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2015
Branch
Dec. 31, 2014
BASIS OF PRESENTATION [Abstract]    
Number of full-service branches 8jaxb_NumberOfFullServiceBranches  
Significant concentrations of loans $ 0us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure  
Period from which interest income on a loan is discontinued 90 days  
Period after which unsecured loans are charged off 90 days  
Overdrawn customer checking accounts reclassified as commercial loans 69us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1 78us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1
Measurement period for loans acquired 12 months  
Impairment analysis factor, minimum loan amount 100jaxb_ImpairmentAnalysisFactorMinimumLoanAmount  
Impairment analysis factor, past due period 90 days  
Troubled debt restructurings, accrued interest determination factor, period 90 days  
Number of years over which losses recognized by each portfolio segment are included in the determination of the historical loss component of the allowance 5 years  
Loss recorded to non interest expense   $ 140us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown