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ALLOWANCE FOR LOAN LOSSES (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Receivables [Abstract]                
Allowance for loan losses $ (14,602)   $ (14,602)     $ (5,635)    
Financing Receivable, Allowance for Credit Losses 14,602 $ 7,431 14,602 $ 7,431 $ 6,415   $ 6,666 $ 6,255
Increase in allowance from tax season loans     8,200          
Provision for loan losses $ 8,649 $ 1,173 9,492 1,959        
Net charge offs (recoveries)     $ 500 $ 800