SHARE-BASED COMPENSATION (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation cost	$ 1.2	$ 1.3	$ 2.6	$ 2.6
Performance-Accelerated Restricted Share (PARS) Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 0.9	1.0	$ 2.0	2.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares	204,392		204,392
Non-Employee Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total income tax benefit recognized	$ 0.3	0.4	$ 0.6	0.7
Pretax compensation expense	0.3	$ 0.3	0.5	$ 0.5
Total unrecognized compensation cost related to share-based compensation arrangements	$ 5.6		$ 5.6
Remaining weighted-average period for recognition of total unrecognized compensation cost	1 year 2 months 12 days

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of non-vested options outstanding.

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