Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Revenue		$ 550,214	$ 465,910
Recurring revenue
Disaggregation Of Revenue [Line Items]
Revenue	[1]	506,027	417,110
Perpetual license
Disaggregation Of Revenue [Line Items]
Revenue		8,440	13,244
Professional services
Disaggregation Of Revenue [Line Items]
Professional services		$ 35,747	$ 35,556

[1] Recurring revenue is comprised of on-premises subscription, perpetual support, SaaS, and cloud services revenue.