PROPERTY, PLANT AND EQUIPMENT (Details) - Summary of Property Plant and Equipment - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 635,559	$ 576,977
Accumulated depreciation and amortization	(354,834)	(344,842)
Total	280,725	232,135
Land, building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	89,770	71,764
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	497,743	462,173
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 48,046	$ 43,040