OTHER COMPREHENSIVE INCOME (LOSS) - Summary of OCI (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	$ 3,465		$ 4,455		$ 15,661	$ 1,411
Total other comprehensive income (loss), tax	(852)		494		(829)	787
Total other comprehensive income (loss), net of taxes	2,613	$ 12,219	4,949	$ (2,751)	14,832	2,198
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	334		6,049		12,271	3,730
Total other comprehensive income (loss), tax	0		0		0	0
Total other comprehensive income (loss), net of taxes	334		6,049		12,271	3,730
Pension and other defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	941		177		2,029	1,023
Total other comprehensive income (loss), tax	(195)		(37)		(421)	(215)
Total other comprehensive income (loss), net of taxes	746		140		1,608	808
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), pre-tax	2,190		(1,771)		1,361	(3,342)
Total other comprehensive income (loss), tax	(657)		531		(408)	1,002
Total other comprehensive income (loss), net of taxes	$ 1,533		$ (1,240)		$ 953	$ (2,340)