Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Line Items]
U.S. federal statutory rates	21.00%	21.00%	21.00%	21.00%
Effective income tax rate	(4.40%)	(16.60%)	(22.10%)	(21.30%)
Provision for income taxes	$ 11,647	$ 3,706	$ 45,988	$ 4,956
Net change in provision for income taxes	$ 7,900		$ 41,000
U.S.
Income Tax Disclosure [Line Items]
Research and development expenditure, maximum amortize period			5 years
Foreign
Income Tax Disclosure [Line Items]
Research and development expenditure, maximum amortize period			15 years