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UNREALIZED LOSSES ON INVESTMENT SECURITIES AVAILABLE-FOR-SALE (Tables)
6 Months Ended
Mar. 31, 2026
Unrealized Losses on Investment Securities Available-for-Sale [Abstract]  
Schedule of Available-for-Sale Securities with Unrealized Losses Details of available-for-sale securities with unrealized losses at March 31, 2026 and September 30, 2025 are summarized in the following tables:
          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)  
March 31, 2026                                          
Securities available-for-sale                                                        
Obligations of U.S. government agencies:                                                        
Mortgage-backed securities - residential     1     $     $     $ 78     $ (8 )   $ 78     $ (8 )
Obligations of U.S. government-sponsored enterprises                                                        
Mortgage-backed securities - residential     10       5,948       (34 )     6,481       (973 )     12,429       (1,007 )
Total     11     $ 5,948     $ (34 )   $ 6,559     $ (981 )   $ 12,507     $ (1,015 )

 

          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)  
September 30, 2025            
Securities available-for-sale                                                        
Obligations of U.S. government agencies:                                                        
Mortgage-backed securities - residential     1     $     $     $ 82     $ (8 )   $ 82     $ (8 )
Obligations of U.S. government-sponsored enterprises                                                        
Mortgage-backed securities - residential     7                   6,728       (1,082 )     6,728       (1,082 )
Total     8     $     $     $ 6,810     $ (1,090 )   $ 6,810     $ (1,090 )