Goodwill and Intangible Assets - Schedule of Aggregate Amortization Expense for Intangible Assets with Finite Lives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 12,012	$ 11,380	$ 24,084	$ 22,820
Cost of revenue	7,768	8,131	15,668	16,431
Total amortization expense	$ 19,780	$ 19,511	$ 39,752	$ 39,251