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Fair Value Measurements (Tables) | 6 Months Ended
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Mar. 31, 2025
Fair Value Disclosures [Abstract] |
Fair Value of Assets and Liabilities Measured on a Recurring Basis | The fair values of the Company's assets and liabilities measured on a recurring basis are categorized as follows:
| March 31, 2025 |  | September 30, 2024
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives (1) | $ | — |  |  | $ | 570 |  |  | $ | — |  |  | $ | 570 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Equity and fixed income mutual funds | — |  |  | 850 |  |  | — |  |  | 850 |  |  | — |  |  | 839 |  |  | — |  |  | 839 |
Life insurance policies | — |  |  | 5,115 |  |  | — |  |  | 5,115 |  |  | — |  |  | 5,493 |  |  | — |  |  | 5,493 |
Total assets at fair value | $ | — |  |  | $ | 6,535 |  |  | $ | — |  |  | $ | 6,535 |  |  | $ | — |  |  | $ | 6,332 |  |  | $ | — |  |  | $ | 6,332 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives (1) (2) | $ | — |  |  | $ | 77,237 |  |  | $ | — |  |  | $ | 77,237 |  |  | $ | — |  |  | $ | 69,573 |  |  | $ | — |  |  | $ | 69,573 |
Total liabilities at fair value | $ | — |  |  | $ | 77,237 |  |  | $ | — |  |  | $ | 77,237 |  |  | $ | — |  |  | $ | 69,573 |  |  | $ | — |  |  | $ | 69,573 |
(1) Interest rate swaps and cross currency swaps are valued based on observable market swap rates and are classified within Level 2 of the fair value hierarchy. (2) Derivative amounts at March 31, 2025 and September 30, 2024 reflect $73,422 and $58,432 of partial advance payments received from the counterparties to certain cross-currency swaps, respectively. See Note 8, "Derivatives and Hedging Activities" for further details.

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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