v3.26.1
INVESTMENT SECURITIES - Schedule of Mortgage-Backed Securities Held-to-Maturity (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Mortgage backed securities:    
Fair Value, Mortgage backed securities $ 60,924 $ 61,160
Total securities held-to-maturity 66,923 $ 67,266
Mortgage-Backed Securities [Member]    
Schedule of Mortgage-Backed Securities Held-to-Maturity [Line Items]    
Amortized Cost, Due within 1 year 1,500  
Fair Value, Due within 1 year 1,497  
Amortized Cost, Due after 1 but within 5 years 13,273  
Fair Value, Due after 1 but within 5 years 12,720  
Amortized Cost, Due after 5 but within 10 years 1,108  
Fair Value, Due after 5 but within 10 years 978  
Amortized Cost, Due after 10 years  
Fair Value, Due after 10 years  
Amortized Cost, Total debt securities 15,881  
Fair Value, Total debt securities 15,195  
Mortgage backed securities:    
Fair Value, Mortgage backed securities 60,924  
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date 51,042  
Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value 45,729  
Total securities held-to-maturity 66,923  
Residential [Member] | Mortgage-Backed Securities [Member]    
Mortgage backed securities:    
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date 47,422  
Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value 42,100  
Commercial [Member] | Mortgage-Backed Securities [Member]    
Mortgage backed securities:    
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date 3,620  
Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value $ 3,629