SHARE-BASED COMPENSATION (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Selling, general and administrative expenses
SHARE-BASED COMPENSATION
Total share-based compensation cost	$ 2.2	$ 1.9
Total income tax benefit recognized	0.2	0.1
Performance-Accelerated Restricted Share (PARS) Awards
SHARE-BASED COMPENSATION
Pretax compensation expense	$ 1.9	1.6
Non-vested shares	234,036
Compensation Plan for Non-Employee Directors
SHARE-BASED COMPENSATION
Pretax compensation expense	$ 0.3	$ 0.3
Total unrecognized compensation cost related to share-based compensation arrangements	$ 15.5
Weighted average period	2 years