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SHARE-BASED COMPENSATION (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
SHARE-BASED COMPENSATION
Total unrecognized compensation cost related to share-based compensation arrangements	$ 10.9		$ 10.9
Selling, general and administrative expenses
SHARE-BASED COMPENSATION
Total share-based compensation cost	1.7	$ 1.4	3.4	$ 2.7
Performance-Accelerated Restricted Share Awards
SHARE-BASED COMPENSATION
Pretax compensation expense	$ 1.5	1.1	$ 2.8	2.1
Non-vested shares	210,119		210,119
Compensation Plan for Non-Employee Directors
SHARE-BASED COMPENSATION
Vesting period			1 year 10 months 24 days
Pretax compensation expense	$ 0.3	0.3	$ 0.6	0.6
Total income tax benefit recognized	$ 0.3	$ 0.3	$ 0.5	$ 0.7

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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