EARNINGS PER SHARE (EPS) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Common shares outstanding (in shares)	57,205	57,032	57,205	57,032
Unallocated ESOP shares (in shares)	(933)	(1,769)	(933)	(1,769)
Non-vested restricted stock (in shares)	(3,113)	(3,533)	(3,113)	(3,533)
Impact of weighted average shares (in shares)	(121)	(62)	(350)	(307)
Weighted average shares outstanding - basic (in shares)	53,038	51,668	52,809	51,423
Incremental shares from stock based compensation (in shares)	0	1,762	0	2,179
Weighted average shares outstanding - diluted (in shares)	53,038	53,430	52,809	53,602
Anti-dilutive restricted stock excluded from diluted EPS computation (in shares)	2,326	0	2,525	0