SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS - Schedule of valuation and qualifying accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Consumer and Professional Products
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Impairment of inventory	$ 23,763	$ 37,100	$ 3,805
Allowance for credit losses
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of  Year	11,264	12,137	8,787
Additions	636	971	1,172
Reductions	(1,325)	(1,186)	(251)
Other	411	(658)	2,429
Balance at End of Year	10,986	11,264	12,137
Inventory valuation
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of  Year	55,737	22,875	31,605
Additions	27,210	44,570	4,725
Reductions	(27,353)	(11,692)	(14,103)
Other	691	(16)	648
Balance at End of Year	56,285	55,737	22,875
Deferred tax valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of  Year	17,992	13,490	10,425
Additions	8,997	4,502	4,330
Reductions	0	0	(1,265)
Other	0	0	0
Balance at End of Year	$ 26,989	$ 17,992	$ 13,490