OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	$ 4,515	$ (16,715)
Tax	37	(984)
Net of tax	4,552	(17,699)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	3,601	(20,018)
Tax	0	0
Net of tax	3,601	(20,018)
Pension and other defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	2,310	69
Tax	(382)	(14)
Net of tax	1,928	55
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	(1,396)	3,234
Tax	419	(970)
Net of tax	$ (977)	$ 2,264