CREDIT LOSSES - Schedule of accounts receivable, allowance for credit losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 8,787	$ 8,178
Allowance for credit losses acquired	2,598
Provision for losses on accounts receivable	1,172	795
Amounts written off charged against the allowance	(251)	(393)
Other, primarily foreign currency translation	(169)	207
Ending balance	$ 12,137	$ 8,787