Supporting Financial Information - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest expense	$ 3,127	$ 3,756	$ 10,297	$ 11,588
Interest income	(15)	(10)	(57)	(34)
Amortization of deferred financing costs	428	397	1,309	1,437
Interest expense	$ 3,540	$ 4,143	$ 11,549	$ 12,991