Summary of Significant Accounting Policies - Summary of Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Contract With Customer, Liability [Roll Forward]
Beginning contract liability	$ 49,667	$ 46,536	$ 63,955	$ 51,649
Revenue recognized from contract liabilities included in the beginning balance	(34,891)	(29,787)	(57,896)	(47,967)
Increases due to cash received, net of amounts recognized in revenue during the period	19,140	26,679	27,857	39,746
Ending contract liability	$ 33,916	$ 43,428	$ 33,916	$ 43,428