Contingencies - Warranty (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
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	$ 12,681	$ 12,421	$ 12,931	$ 13,052
Accruals for warranties issued	2,842	2,921	8,025	7,958
Net changes in liability related to warranties existing in prior periods	536	(294)	558	26
Payments made	(3,039)	(2,702)	(8,494)	(8,690)
Balance at end of period	$ 13,020	$ 12,346	$ 13,020	$ 12,346