EARNINGS PER SHARE (EPS) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Common shares outstanding (in shares)	54,663	57,064	54,663	57,064
Unallocated ESOP shares (in shares)	(565)	(1,396)	(565)	(1,396)
Non-vested restricted stock (in shares)	(3,113)	(3,565)	(3,113)	(3,565)
Impact of weighted average shares (in shares)	1,319	(369)	1,655	(576)
Weighted average shares outstanding - basic (in shares)	52,304	51,734	52,640	51,527
Incremental shares from stock based compensation (in shares)	2,298	2,180	2,447	2,177
Weighted average shares outstanding - diluted (in shares)	54,602	53,914	55,087	53,704