SHARE-BASED COMPENSATION (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Selling, general and administrative expenses
SHARE-BASED COMPENSATION
Total share-based compensation cost	$ 1.3	$ 1.3	$ 4.2	$ 3.9
Performance-Accelerated Restricted Share Awards
SHARE-BASED COMPENSATION
Pretax compensation expense	$ 1.0	1.1	$ 3.2	3.1
Non-vested shares	221,024		221,024
Non-Employee Directors Plan
SHARE-BASED COMPENSATION
Pretax compensation expense	$ 0.3	0.3	$ 1.0	0.8
Total income tax benefit recognized	0.2	$ 0.2	0.9	$ 0.8
Total unrecognized compensation cost related to share-based compensation arrangements	$ 9.2		$ 9.2
Remaining weighted-average period for recognition of total unrecognized compensation cost			2 years 2 months 12 days

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

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