Detail of Selected Balance Sheet Accounts - Schedule of Property, Plant And Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 254,225	$ 256,069
Less: Accumulated depreciation	(125,461)	(116,649)
Total property, plant and equipment, net	128,764	139,420
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	22,207	22,441
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 123,320	121,960
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Asset lives	3 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Asset lives	39 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 104,542	106,113
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Asset lives	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Asset lives	15 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 3,799	3,806
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Asset lives	3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Asset lives	10 years
Construction in process
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 357	$ 1,749