Income Taxes - Schedule of Foreign and Domestic Income Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Domestic	$ 106,379	$ 82,703	$ 26,209
Foreign	40,394	32,905	25,424
Income before income taxes	$ 146,773	$ 115,608	$ 51,633