Contingencies - Warranty (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Standard product warranty length, minimum			1 year
Standard product warranty length, maximum			2 years
Limited product warranty length (up to)			10 years
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 12,348	$ 13,159	$ 13,046	$ 13,926
Accruals for warranties issued	2,208	2,335	4,112	3,938
Warranty expenditures	(2,427)	(2,421)	(5,029)	(4,791)
Balance at end of period	$ 12,129	$ 13,073	$ 12,129	$ 13,073