VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Valuation allowance for deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BEGINNING BALANCE	$ 23,613	$ 17,639	$ 4,035
ADDITIONS CHARGED TO EXPENSE	(1,372)	6,355	15,869
OTHER	0	(381)	(2,265)
ENDING BALANCE	22,241	23,613	17,639
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BEGINNING BALANCE	24,652	7,242	6,148
ADDITIONS CHARGED TO EXPENSE	2,401	18,986	2,238
OTHER	(7,674)	(1,576)	(1,144)
ENDING BALANCE	$ 19,379	$ 24,652	$ 7,242