INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Income Tax Examination [Line Items]
Valuation allowance increase (decrease)	$ 3,065	$ 601
Undistributed earnings of foreign subsidiaries	178,233
Deferred tax assets, valuation allowance	13,490	10,425
Potential tax benefits impact on effective tax rate	3,536
Liability for uncertainty in income taxes, current	521	100
Domestic Tax Authority
Income Tax Examination [Line Items]
Operating loss carryforwards	44,521	0
Tax credit carryforward amount	5,933	5,933
Domestic Tax Authority | Capital Loss Carryforward
Income Tax Examination [Line Items]
Tax credit carryforward amount	0	10,327
Non-U.S. Tax Authority
Income Tax Examination [Line Items]
Operating loss carryforwards	8,798	8,332
State and Local Jurisdiction
Income Tax Examination [Line Items]
Operating loss carryforwards	$ 192,134	$ 139,894