Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Sep. 30, 2024
Income Tax Disclosure [Line Items]
Provision (benefit) for income taxes	$ 10,922	$ 19,212
Unrecognized tax benefits	43,400		$ 65,000
Income tax provision upon recognition of unrecognized tax benefit	43,400
Unrecognized tax benefits, increase in valuation allowance upon recognition	6,300
Potential decrease in unrecognized tax benefits	5,000
Foreign Tax Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Provision (benefit) for income taxes	$ 5,400	$ 3,600