PROPERTY, PLANT AND EQUIPMENT (Details) - Summary of Property Plant and Equipment - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 729,660	$ 576,977
Accumulated depreciation and amortization	(404,582)	(344,842)
Total	325,078	232,135
Land, building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	129,905	71,764
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	550,714	462,173
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 49,041	$ 43,040