PROPERTY, PLANT AND EQUIPMENT - Summary of property plant and equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 706,961	$ 715,596
Accumulated depreciation and amortization	(412,400)	(425,374)
Total	294,561	290,222
Land, building and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	159,693	155,574
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	511,779	520,110
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 35,489	$ 39,912