Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Disaggregation Of Revenue [Line Items]
Revenue		$ 603,072	$ 542,181	$ 1,153,286	$ 1,008,091
Recurring revenue
Disaggregation Of Revenue [Line Items]
Revenue	[1]	564,014	492,143	1,070,041	909,253
Perpetual license
Disaggregation Of Revenue [Line Items]
Revenue		6,753	8,921	15,193	22,165
Professional services
Disaggregation Of Revenue [Line Items]
Professional services		$ 32,305	$ 41,117	$ 68,052	$ 76,673

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