EARNINGS PER SHARE (EPS) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Common shares outstanding (in shares)	57,064	56,677	57,064	56,677
Unallocated ESOP shares (in shares)	(1,396)	(1,912)	(1,396)	(1,912)
Non-vested restricted stock (in shares)	(3,565)	(3,814)	(3,565)	(3,814)
Impact of weighted average shares (in shares)	(369)	(48)	(576)	(172)
Weighted average shares outstanding - basic (in shares)	51,734	50,903	51,527	50,779
Incremental shares from stock based compensation (in shares)	2,180	2,601	2,177	2,527
Weighted average shares outstanding - diluted (in shares)	53,914	53,504	53,704	53,306