Detail of Selected Balance Sheet Accounts - Schedule of Property, Plant And Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 256,233	$ 254,225
Less: Accumulated depreciation	(135,421)	(125,461)
Total property, plant and equipment, net	120,812	128,764
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	21,963	22,207
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment gross	$ 122,404	123,320
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	$ 106,137	104,542
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	$ 3,611	3,799
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	$ 2,118	$ 357