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FAIR VALUE MEASUREMENT OF FINANCIAL INSTRUMENTS - Supplemental Fair Value Information about Long-Term Fixed-Rate Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | ---
Long-term debt, net |  |
Carrying value | $ 1,781,674 | $ 1,782,182
Carrying value |  |
Long-term debt, net |  |
Carrying value | 1,781,700 | 1,782,200
Fair value | Level 2 |  |
Long-term debt, net |  |
Fair value | $ 1,666,500 | $ 1,702,900

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- Definition Long-Term Debt, Excluding Current Maturities, Fair Value + References No definition available. + Details
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- References No definition available. + Details
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