Financial Instruments - Long-Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Financial Instruments, Owned, at Fair Value, by Type, Alternative [Abstract]
Carrying Amount	$ 2,682,861	$ 2,688,243
Fair Value	$ 2,696,145	$ 2,656,888

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

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