Income Taxes - Schedule of Reconciliation of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Provision for income taxes attributable to continuing operations
Income tax expense (benefit) at the federal statutory rate	$ 24,278	$ 10,843	$ 14,223
State taxes, net of federal benefit	3,421	1,814	1,728
Mexico inflation adjustment	(2,154)	(1,787)	(2,089)
Non-deductible items	4,169	2,655	1,705
Foreign rate differential	2,098	2,381	1,306
Change in valuation allowance	(411)	311	660
Stock compensation	(202)	(62)	(161)
Uncertain tax positions	(198)	(174)	(2,025)
Foreign withholding tax	998	0	0
Deferred tax true-up	587	(165)	3,811
Dividends received deduction	(742)	(754)	(699)
Non-deductible loss on debt restructuring	0	1,710	0
U.S. GAAP/statutory book adjustments	(239)	(1,143)	0
Other	908	(2,459)	(906)
Total income tax expense	$ 32,513	$ 13,170	$ 17,553
Effective tax rate	28.00%	26.00%	26.00%