Fair Value of Financial Instruments - Reconciliation of Liabilities Measured at Fair Value Using Significant Unobservable Inputs Level 3 (Parenthetical) (Details) - Long-Term Credit Facility - USD ($) $ in Thousands	Mar. 31, 2026	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Cost	$ 201,456	$ 426,456	$ 314,456	$ 461,456
Cost Before Temporary Draws	$ 191,456		$ 314,456

Fair Value of Financial Instruments - Reconciliation of Liabilities Measured at Fair Value Using Significant Unobservable Inputs Level 3 (Parenthetical) (Details) - Long-Term Credit Facility - USD ($)
$ in Thousands

Mar. 31, 2026

Sep. 30, 2025

Mar. 31, 2025

Sep. 30, 2024

Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]

Cost

$ 201,456

$ 426,456

$ 314,456

$ 461,456

Cost Before Temporary Draws

$ 191,456

$ 314,456