PROPERTY, PLANT AND EQUIPMENT (Details) - Summary of Property Plant and Equipment - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Gross	$ 1,014,812	$ 993,499
Accumulated depreciation and amortization	(606,541)	(588,095)
Total	408,271	405,404
Land, building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Gross	142,358	138,204
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Gross	811,410	804,280
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Gross	$ 61,044	$ 51,015