Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Current:
Federal	$ 9,465	$ (479)	$ (6,631)
State and foreign	3,143	4,646	10,544
Total	12,608	4,167	3,913
Deferred:
Federal	983	3,202	(1,561)
State and foreign	3,962	81	(3,984)
Total	4,945	3,283	(5,545)
Total income tax expense (benefit)	$ 17,553	$ 7,450	$ (1,632)