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EMPLOYEE BENEFIT PLANS (Details) - ESOP Shares - shares
Sep. 30, 2018
Sep. 30, 2017
Retirement Benefits [Abstract]    
Allocated shares 3,157,530 2,676,486
Unallocated shares 2,477,385 3,125,850
Employee Stock Ownership Plan (ESOP), Shares in ESOP 5,634,915 5,802,336