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COMMITMENTS AND CONTINGENCIES (Details)
$ in Millions
 12 Months Ended
Sep. 30, 2015
USD ($)
Commitment
Company
ClassAction
Court
Sep. 30, 2014
USD ($)
COMMITMENTS AND CONTINGENCIES [Abstract]    
Unfunded loan commitments $ 158.3 $ 96.0
Number of commitment to purchase securities, available for sale | Commitment 2  
Purchase commitment amount, available for sale $ 7.9  
Number of commitment to purchase securities, held to maturity | Commitment 3  
Purchase commitment amount, held to maturity $ 3.0  
Commitment to purchase securities   0.0
Securities pledged as collateral for public funds on deposit 5.8 5.8
Securities pledged as collateral for individual, trust, and estate deposits $ 0.0 $ 7.4
Loss Contingencies [Line Items]    
Number of identified limited liability companies | Company 3  
Number of class action litigations | ClassAction 4  
Number of federal district courts | Court 3  
Inter National Bank [Member]    
Loss Contingencies [Line Items]    
Amount of shortfall in depository account $ 10.5  
Springbok Services Inc. [Member]    
Loss Contingencies [Line Items]    
Estimate of possible loss 1.5  
Range of reasonably possible loss, minimum 0.0  
Range of reasonably possible loss, maximum $ 0.3  
UniRush, LLC [Member]    
Loss Contingencies [Line Items]    
Period of inability of customers of prepaid card product to access product 14 days