Income Taxes - Components of Income Taxes Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Current provision:
Federal	$ 2,301	$ 6,074	$ 9,315
Foreign	2,777	2,888	3,204
State	1,638	2,644	2,307
Total current provision	6,716	11,606	14,826
Deferred (benefit) provision:
Federal	(9,472)	5,733	18,723
Foreign	367	(3,238)
State	(3,986)	1,492	4,408
Total deferred (benefit) provision	(13,091)	3,987	23,131
Total income tax (benefit) provision	$ (6,375)	$ 15,593	$ 37,957

Amount of current federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current national tax expense (benefit) for non-US (United States of America) jurisdiction.

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