Supporting Financial Information - Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest expense	$ 13,360	$ 15,352
Interest income	(71)	(38)
Amortization of deferred financing costs	1,742	1,839
Interest expense	$ 15,031	$ 17,153