OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of OCI (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	$ (3,996)		$ 3,465		$ 6,494	$ 15,661
Total other comprehensive income (loss), Tax	(900)		(852)		(915)	(829)
Total other comprehensive income (loss), Net of taxes	(4,896)	$ 10,475	2,613	$ 12,219	5,579	14,832
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	(7,199)		334		3,039	12,271
Total other comprehensive income (loss), Tax	0		0		0	0
Total other comprehensive income (loss), Net of taxes	(7,199)		334		3,039	12,271
Pension and other defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	672		941		1,345	2,029
Total other comprehensive income (loss), Tax	(141)		(195)		(282)	(421)
Total other comprehensive income (loss), Net of taxes	531		746		1,063	1,608
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	2,531		2,190		2,110	1,361
Total other comprehensive income (loss), Tax	(759)		(657)		(633)	(408)
Total other comprehensive income (loss), Net of taxes	$ 1,772		$ 1,533		$ 1,477	$ 953