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SHARE-BASED COMPENSATION (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
SHARE-BASED COMPENSATION |  |  |  |
Non-vested shares | 221,595 |  | 221,595 |
Selling, general and administrative expenses |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Total share-based compensation cost | $ 2.2 | $ 1.7 | $ 6.4 | $ 7.0
Total income tax benefit recognized | 0.5 | 0.2 | 1.4 | 0.9
Performance-Accelerated Restricted Share (PARS) Awards |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Pretax compensation expense | 2.0 | 1.4 | 5.5 | 6.0
Compensation Plan for Non-Employee Directors |  |  |  |
SHARE-BASED COMPENSATION |  |  |  |
Pretax compensation expense | 0.3 | $ 0.3 | 0.9 | $ 1.0
Total unrecognized compensation cost related to share-based compensation arrangements | $ 11.0 |  | $ 11.0 |
Weighted average period |  |  | 1 year 6 months |

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