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SHARE-BASED COMPENSATION (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Selling, general and administrative expenses
SHARE-BASED COMPENSATION
Total share-based compensation cost	$ 1.3	$ 1.2	$ 3.9	$ 3.9
Performance-Accelerated Restricted Share Awards
SHARE-BASED COMPENSATION
Pretax compensation expense	$ 1.0	0.9	$ 3.1	3.1
Non-vested shares	280,504		280,504
Non-Employee Directors Plan
SHARE-BASED COMPENSATION
Pretax compensation expense	$ 0.3	0.3	$ 0.8	0.8
Total income tax benefit recognized	0.2	$ 0.2	0.8	$ 0.9
Total unrecognized compensation cost related to share-based compensation arrangements	$ 10.7		$ 10.7
Remaining weighted-average period for recognition of total unrecognized compensation cost			2 years 1 month 6 days

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

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