CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 8,172	$ 15,386	$ 29,969
Unrealized losses on securities available for sale:
Unrealized holding losses arising during the period	(3,772)	(45,068)	(2,923)
Income tax benefit	806	9,464	614
Net of tax amount	(2,966)	(35,604)	(2,309)
Less: reclassification adjustment for realized (gains) losses included in net income	551	(476)	0
Income tax expense (benefit)	(115)	101	0
Net of tax amount	436	(375)	0
Less: reclassification adjustment for other-than-temporary impairment loss on securities included in net income	28	0	0
Income tax benefit	(6)	0	0
Net of tax amount	22	0	0
Other Comprehensive Loss	(2,508)	(35,979)	(2,309)
Comprehensive Income (Loss)	5,664	(20,593)	27,660
Less: comprehensive income attributable to noncontrolling interests	0	0	402
Comprehensive Income (Loss) Attributable to First Savings Financial Group, Inc.	$ 5,664	$ (20,593)	$ 27,258