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Investments - Noncurrent Investments (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Sep. 30, 2025 | May 01, 2025
--- | --- | --- | ---
Investments, Debt and Equity Securities [Abstract] |  |  |
Equity and fixed income mutual funds | $ 575 | $ 859 |
Life insurance policies | 4,126 | 5,239 |
Equity-method investments | 202,552 | 214,133 | $ 213
Preferred equity investment | 51,594 | 52,086 | $ 50,000
Other (primarily cost-method) investments | 17,319 | 16,320 |
Total non-current investments | $ 276,166 | $ 288,637 |

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- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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