PROPERTY, PLANT AND EQUIPMENT - Schedule of Property Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 636,332	$ 651,635
Accumulated depreciation	(367,203)	(372,417)
Total	269,129	279,218
Land, building and building improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	145,321	169,923
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	456,968	447,972
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 34,043	$ 33,740