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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
3 Months Ended
Dec. 31, 2014
Sep. 30, 2017
Oct. 14, 2016
Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]        
Unfunded loan commitments   $ 233,200,000   $ 182,900,000
Commitment to purchase securities   0   0
Securities pledged as collateral for public funds on deposit   5,700,000   5,800,000
Securities pledged as collateral for individual, trust, and estate deposits   $ 3,800,000   $ 3,400,000
Inter National Bank [Member]        
Loss Contingencies [Line Items]        
Amount of shortfall in depository account $ 10,500,000      
Card Limited, LLC v. MetaBank dba Meta Payment Systems [Member]        
Loss Contingencies [Line Items]        
Estimate of possible loss     $ 4,001,025.45