Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2025	Dec. 31, 2024
Disaggregation Of Revenue [Line Items]
Revenue		$ 685,825	$ 565,128
Recurring revenue
Disaggregation Of Revenue [Line Items]
Revenue	[1]	657,280	524,311
Perpetual license
Disaggregation Of Revenue [Line Items]
Revenue		5,630	9,405
Professional services
Disaggregation Of Revenue [Line Items]
Professional services		$ 22,915	$ 31,412

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