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INVESTMENT SECURITIES (Summary of Amortized Cost and Fair Values of Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Held to Maturity Securities, Amortized Cost
Due within 1 year
Due after 1 but within 5 years	1,499
Due after 5 but within 10 years	3,967
Due after 10 years
Total debt securities	5,466
Mortgage Backed Securities, Residential	27,581
Mortgage Backed Securities, Commercial	873
Amortized cost	33,920	$ 33,645
Held to Maturity Securities, Fair Value
Due within 1 year
Due after 1 but within 5 years	1,500
Due after 5 but within 10 years	3,587
Due after 10 years
Total debt securities	5,087
Mortgage Backed Securities, Residential	27,285
Mortgage Backed Securities, Commercial	864
Fair value	$ 33,236	$ 32,151

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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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