FAIR VALUE MEASUREMENT OF FINANCIAL INSTRUMENTS - Supplemental Fair Value Information about Long-Term Fixed-Rate Debt (Details) - USD ($) $ in Thousands |
Jun. 30, 2024 |
Sep. 30, 2023 |
|---|---|---|
| Long-term debt, net | ||
| Carrying value | $ 545,589 | $ 545,144 |
| Carrying value | ||
| Long-term debt, net | ||
| Carrying value | 545,600 | 545,100 |
| Fair value | Level 2 | ||
| Long-term debt, net | ||
| Fair value | $ 454,500 | $ 435,500 |