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BORROWINGS (Schedule of Short-Term Arrangements With the FHLBNY) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Debt Disclosure [Abstract]    
Balance at end of year  
Weighted average balance during the year $ 1,080 2,958
Maximum month-end balance during the year $ 16,200 $ 18,500
Average interest rate during the year 0.56% 0.37%