SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS - Schedule of valuation and qualifying accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Allowance for Doubtful Accounts
Segment Reporting Information [Line Items]
Balance at Beginning of  Year	$ 8,787	$ 8,178	$ 7,588
Additions	1,172	795	5,175
Reductions	(251)	(393)	(4,584)
Other	2,429	207	(1)
Balance at End of Year	12,137	8,787	8,178
Inventory valuation
Segment Reporting Information [Line Items]
Balance at Beginning of  Year	31,605	18,903	15,218
Additions	4,725	24,400	6,771
Reductions	(14,103)	(12,099)	(3,412)
Other	648	401	326
Balance at End of Year	22,875	31,605	18,903
Deferred tax valuation allowance
Segment Reporting Information [Line Items]
Balance at Beginning of  Year	10,425	9,824	10,823
Additions	4,330	601	0
Reductions	(1,265)	0	(999)
Other	0	0	0
Balance at End of Year	$ 13,490	$ 10,425	$ 9,824