OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of OCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	$ 10,490	$ 12,196
Total other comprehensive income (loss), tax	(15)	23
Total other comprehensive income (loss), net of taxes	10,475	12,219
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	10,238	11,937
Total other comprehensive income (loss), tax	0	0
Total other comprehensive income (loss), net of taxes	10,238	11,937
Pension and other defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	673	1,088
Total other comprehensive income (loss), tax	(141)	(226)
Total other comprehensive income (loss), net of taxes	532	862
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	(421)	(829)
Total other comprehensive income (loss), tax	126	249
Total other comprehensive income (loss), net of taxes	$ (295)	$ (580)