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DEBT - Interest Rate Swap Agreements (Details) - USD ($) $ in Millions | 12 Months Ended |
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Sep. 30, 2024 | Sep. 30, 2025
Interest Rate Swap, Instrument 1 |  |
Derivative [Line Items] |  |
Notional amount |  | $ 150.0
Fixed rate (percentage) |  | 3.37%
Interest Rate Swap, Instrument 2 |  |
Derivative [Line Items] |  |
Notional amount |  | $ 50.0
Fixed rate (percentage) |  | 3.34%
Interest Rate Swap, Instrument 3 |  |
Derivative [Line Items] |  |
Notional amount |  | $ 100.0
Fixed rate (percentage) |  | 4.74%
Interest Rate Swap, Instrument 4 |  |
Derivative [Line Items] |  |
Notional amount |  | $ 150.0
Fixed rate (percentage) |  | 4.25%
Interest Rate Swap, Instrument 5 |  |
Derivative [Line Items] |  |
Notional amount |  | $ 100.0
Fixed rate (percentage) |  | 3.40%
Designated as Hedging Instruments | Interest rate swap agreements |  |
Derivative [Line Items] |  |
Notional amount |  | $ 450.0
Cash payment from terminated interest rate swap agreement | $ 11.0 |

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