Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021
Income Tax Disclosure [Line Items]
Federal statutory income tax rate	21.00%	21.00%	21.00%	21.00%
Tax expense related to gain on sale of PLM services business	$ 15,500
Tax deductible goodwill			$ 8,100
Unrecognized tax benefits	24,100,000		24,100,000		$ 21,200,000
Income tax provision upon recognition of unrecognized tax benefit	24,100,000		24,100,000
Unrecognized tax benefits that would impact valuation allowance	4,900,000		4,900,000
Potential decrease in unrecognized tax benefits	$ (3,000,000)		(3,000,000)
Arena Solutions
Income Tax Disclosure [Line Items]
Reduction of valuation allowance			(42,300,000)
Charge related to effects of Non US Jurisdiction unrecognized tax benefit			$ 37,300,000