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IMPAIRMENT OF INVESTMENT SECURITIES (Tables)
6 Months Ended
Mar. 31, 2018
Schedule of Investments [Abstract]  
Schedule of gross unrealized losses and fair value for both available for sale and held to maturity securities by investment category and time frame for which the loss has been outstanding

The following tables present the gross unrealized losses and fair value at March 31, 2018 and September 30, 2017 for both available for sale and held to maturity securities by investment category and time frame for which the loss has been outstanding:

       March 31, 2018 
       Less Than 12 Months   12 Months Or Greater   Total 
   Number of   Fair   Unrealized   Fair   Unrealized   Fair   Unrealized 
   Securities   Value   Losses   Value   Losses   Value   Losses 
       (Dollars in thousands) 
Obligations of U.S. government agencies:                                   
Mortgage-backed securities - residential   2   $   $   $513   $(97)  $513   $(97)
Mortgage-backed securities - commercial   1            924    (11)   924    (11)
Obligations of U.S. government-sponsored enterprises                               
Mortgage-backed securities - residential   32    21,349    (402)   22,461    (743)   43,810    (1,145)
Debt securities   5            6,762    (202)   6,762    (202)
Private label mortgage-backed securities residential   2            137    (1)   137    (1)
Corporate securities   1            2,647    (353)   2,647    (353)
        Total   43   $21,349   $(402)  $33,444   $(1,407)  $54,793   $(1,809)

 

       September 30, 2017 
       Less Than 12 Months   12 Months Or Greater   Total 
   Number of   Fair   Unrealized   Fair   Unrealized   Fair   Unrealized 
   Securities   Value   Losses   Value   Losses   Value   Losses 
       (Dollars in thousands) 
Obligations of U.S. government agencies:                            
Mortgage-backed securities - residential   2   $   $   $605   $(96)  $605   $(96)
Mortgage-backed securities - commercial   1    958    (10)           958    (10)
Obligations of U.S. government-sponsored enterprises                                   
Mortgage-backed securities - residential   20    6,582    (92)   21,713    (284)   28,295    (376)
Debt securities   5    4,890    (71)   1,996    (4)   6,886    (75)
Private label mortgage-backed securities residential   2            193    (2)   193    (2)
Corporate securities   1            2,784    (216)   2,784    (216)
        Total   31   $12,430   $(173)  $27,291   $(602)  $39,721   $(775)