Land, Building and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Land, building and equipment, gross	$ 416,523	$ 404,936
Less: accumulated depreciation	(275,207)	(251,484)
Land, building and equipment, net	141,316	153,452
Land [Member]
Property, Plant and Equipment [Line Items]
Land, building and equipment, gross	$ 2,400	2,400
Building
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	30 years
Land, building and equipment, gross	$ 6,696	5,409
Building \| Minimum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	0 years
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Land, building and equipment, gross	$ 167,789	163,359
Machinery and Equipment \| Minimum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	3 years
Machinery and Equipment \| Maximum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	5 years
Computers, Software and Equipment
Property, Plant and Equipment [Line Items]
Land, building and equipment, gross	$ 163,906	179,461
Computers, Software and Equipment \| Minimum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	3 years
Computers, Software and Equipment \| Maximum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	5 years
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Land, building and equipment, gross	$ 36,759	34,970
Leasehold Improvements \| Minimum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	2 years
Leasehold Improvements \| Maximum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	15 years
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Land, building and equipment, gross	$ 17,222	17,249
Furniture and Fixtures \| Minimum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	5 years
Furniture and Fixtures \| Maximum
Property, Plant and Equipment [Line Items]
Building and equipment useful life (in years)	7 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Land, building and equipment, gross	$ 21,751	$ 2,088

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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