PROPERTY, PLANT AND EQUIPMENT (Details) - Summary of property plant and equipment - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Gross	$ 763,542	$ 725,282
Accumulated depreciation and amortization	(426,216)	(382,790)
Total	337,326	342,492
Land, building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Gross	133,036	130,296
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Gross	580,698	544,875
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Gross	$ 49,808	$ 50,111