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INVESTMENT SECURITIES (Summary of Amortized Cost and Fair Values of Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Held to Maturity Securities, Amortized Cost
Due within 1 year
Due after 1 but within 5 years	6,498
Due after 5 but within 10 years	9,000
Due after 10 years
Total debt securities	15,498
Mortgage Backed Securities, Residential	24,561
Mortgage Backed Securities, Commercial	738
Amortized cost	40,797	$ 30,443
Held to Maturity Securities, Fair Value
Due within 1 year
Due after 1 but within 5 years	6,384
Due after 5 but within 10 years	8,652
Due after 10 years
Total debt securities	15,036
Mortgage Backed Securities, Residential	24,710
Mortgage Backed Securities, Commercial	738
Fair value	$ 40,484	$ 30,899

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