PROPERTY, PLANT AND EQUIPMENT (Details) - Summary of Property Plant and Equipment - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 730,615	$ 725,282
Accumulated depreciation and amortization	(394,125)	(382,790)
Total	336,490	342,492
Land, building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	130,007	130,296
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	550,336	544,875
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 50,272	$ 50,111