Summary of Significant Accounting Policies - Summary of Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Contract With Customer, Liability [Roll Forward]
Beginning contract liability	$ 25,973	$ 53,454	$ 29,280	$ 63,955
Revenue recognized from contract liabilities included in the beginning balance	(19,719)	(29,732)	(25,918)	(45,780)
Increases due to cash received, net of amounts recognized in revenue during the period	32,152	25,945	35,044	31,492
Ending contract liability	$ 38,406	$ 49,667	$ 38,406	$ 49,667