Financial Instruments - Other Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Summary of Investment Holdings [Line Items]
Life Insurance Contracts	$ 44,478	$ 44,808
Total other investments	68,346	81,705
Equity Mutual Fund
Summary of Investment Holdings [Line Items]
Mutual Funds	13,786	19,523
Fixed Income Mutual Fund
Summary of Investment Holdings [Line Items]
Mutual Funds	$ 10,082	$ 17,374