PARENT COMPANY CONDENSED FINANCIAL INFORMATION - Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Assets:
Cash and due from banks	$ 18,014	$ 18,312
Other assets	29,290	18,765
Total Assets	2,288,854	2,093,725	$ 1,721,394
Liabilities and Equity:
Stockholders' equity	150,981	151,565
Total Liabilities and Equity	2,288,854	2,093,725
Reportable Legal Entities | Parent Company
Assets:
Cash and due from banks	7,425	16,940
Other assets	1,489	1,165
Investment in subsidiaries	190,946	184,315
Total Assets	199,860	202,420
Liabilities and Equity:
Subordinated notes	48,444	50,217
Accrued expenses	435	638
Stockholders' equity	150,981	151,565
Total Liabilities and Equity	$ 199,860	$ 202,420