Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023
Other Liabilities Disclosure [Abstract]
Accrued compensations and benefits	$ 32,344		$ 45,335
Customer deposits	20,730		18,669
Accrued interest	16,562		23,369
Warranty reserves	10,913	$ 11,554	12,717	$ 11,835	$ 12,129	$ 13,046
Litigation accruals	9,844		9,297
Income tax liabilities	0		2,399
Other	58,425		38,114
Total	$ 148,818		$ 149,900