VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Valuation allowance for deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BEGINNING BALANCE	$ 22,241	$ 23,613	$ 17,639
ADDITIONS CHARGED TO EXPENSE	(16,494)	(1,372)	6,355
OTHER	0	0	(381)
ENDING BALANCE	5,747	22,241	23,613
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BEGINNING BALANCE	19,379	24,652	7,242
ADDITIONS CHARGED TO EXPENSE	1,570	2,401	18,986
OTHER	(9,913)	(7,674)	(1,576)
ENDING BALANCE	$ 11,036	$ 19,379	$ 24,652