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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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