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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Tables)
9 Months Ended
Jun. 30, 2018
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK [Abstract]  
Schedule of fair value, off-balance sheet financial instruments
   2018   2017 
   June 30   September 30 
   (Dollars in thousands) 
Financial instruments whose contract amounts          
represent credit risk          
Letters of credit  $1,929   $633 
Unused lines of credit   50,702    64,220 
Fixed rate loan commitments   3,779    2,429 
Variable rate loan commitments   21,929    3,952 
           
   $78,339   $71,234