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INVESTMENT SECURITIES (Summary of Amortized Cost and Fair Values of Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	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	26,121
Mortgage Backed Securities, Commercial	826
Amortized cost	30,917	$ 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	3,723
Due after 10 years
Total debt securities	3,723
Mortgage Backed Securities, Residential	26,220
Mortgage Backed Securities, Commercial	819
Fair value	$ 30,762	$ 29,344

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Fair value of mortgage-backed commercial debt securities categorized as held-to-maturity.

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Amount of investment in debt security measured at amortized cost (held-to-maturity).

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