Contract Balance - Deferred Revenues (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2024	Sep. 30, 2023
Revenue from Contract with Customer [Abstract]
Contract with Customer, Liability	$ 155,783	$ 143,235
Revenue recognized that was included in the deferred revenues balance at the beginning of the period	122,567
Increases due to billings, excluding amounts recognized as revenue during the period	135,115
Deferred revenue, current portion	149,300	136,700
Deferred revenue, noncurrent	$ 6,500	$ 6,500