Contingencies - Schedule of Warranty Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 12,717	$ 13,046	$ 13,926
Warranty provision	10,337	9,483	9,672
Warranty expenditures	(9,490)	(9,812)	(10,552)
Balance at end of period	$ 13,564	$ 12,717	$ 13,046