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SECURITIES - Held to Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 35,440	$ 36,591
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(3,260)	(5,166)
Fair Value	32,180	31,425
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
LESS THAN 12 MONTHS, Fair Value	0	0
LESS THAN 12 MONTHS, Gross Unrealized (Losses)	0	0
OVER 12 MONTHS, Fair Value	32,180	31,425
OVER 12 MONTHS, Gross Unrealized (Losses)	(3,260)	(5,166)
TOTAL, Fair Value	32,180	31,425
TOTAL, Gross Unrealized (Losses)	(3,260)	(5,166)
Amortized Cost
Due after ten years	33,337	34,415
Total	33,337	34,415
Mortgage-backed securities	2,103	2,176
Fair Value
Due after ten years	30,287	29,571
Total	30,287	29,571
Mortgage-backed securities	1,893	1,854
Non-bank qualified obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	33,337	34,415
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(3,050)	(4,844)
Fair Value	30,287	29,571
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
LESS THAN 12 MONTHS, Fair Value	0	0
LESS THAN 12 MONTHS, Gross Unrealized (Losses)	0	0
OVER 12 MONTHS, Fair Value	30,287	29,571
OVER 12 MONTHS, Gross Unrealized (Losses)	(3,050)	(4,844)
TOTAL, Fair Value	30,287	29,571
TOTAL, Gross Unrealized (Losses)	(3,050)	(4,844)
Mortgage-backed securities
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	2,103	2,176
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(210)	(322)
Fair Value	1,893	1,854
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]
LESS THAN 12 MONTHS, Fair Value	0	0
LESS THAN 12 MONTHS, Gross Unrealized (Losses)	0	0
OVER 12 MONTHS, Fair Value	1,893	1,854
OVER 12 MONTHS, Gross Unrealized (Losses)	(210)	(322)
TOTAL, Fair Value	1,893	1,854
TOTAL, Gross Unrealized (Losses)	$ (210)	$ (322)

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