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INVESTMENT SECURITIES (Summary of Amortized Cost and Fair Values of Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Held to Maturity Securities, Amortized Cost
Due within 1 year
Due after 1 but within 5 years
Due after 5 but within 10 years	3,970
Due after 10 years
Total debt securities	3,970
Mortgage Backed Securities, Residential	25,262
Mortgage Backed Securities, Commercial	810
Amortized cost	30,042	$ 29,481
Held to Maturity Securities, Fair Value
Due within 1 year
Due after 1 but within 5 years
Due after 5 but within 10 years	3,364
Due after 10 years
Total debt securities	3,364
Mortgage Backed Securities, Residential	25,971
Mortgage Backed Securities, Commercial	804
Fair value	$ 30,139	$ 29,344

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