Goodwill and Intangible Assets - Schedule of Aggregate Amortization Expense for Intangible Assets with Finite Lives (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 11,536	$ 10,672	$ 34,356	$ 31,459
Cost of revenue	8,178	9,685	24,609	28,835
Total amortization expense	$ 19,714	$ 20,357	$ 58,965	$ 60,294

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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