Income Taxes - Foreign and Domestic Income Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Domestic	$ 49,937	$ 2,320	$ (31,989)
Foreign	17,776	13,742	(38,106)
Income (loss) before income taxes	$ 67,713	$ 16,062	$ (70,095)