Summary of Significant Accounting Policies - Summary of Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Contract With Customer, Liability [Roll Forward]
Beginning contract liability	$ 59,020	$ 65,460
Revenue recognized from contract liabilities included in the beginning balance	(36,011)	(62,655)
Increases due to business combinations and cash received, net of amounts recognized in revenue during the period	33,114	53,318
Ending contract liability	$ 56,123	$ 56,123