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Property, Plant, and Equipment, Net (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Sep. 30, 2016	Sep. 30, 2015
Construction in progress	$ 185,177		$ 252,763
Property, plant and equipment held for sale	686		681
Service Life [Member]
Change in accounting estimate, financial effect - depreciation expense		$12,000
Second Campus Rockford Illinois [Member]
Construction in progress	72,244		47,629
Capitalized interest	1,369		499
New Campus Fort Collins Colorado [Member]
Construction in progress	48,606		151,669
Capitalized interest	934		$ 5,205
Contruction in progress placed into service	135,000
Office furniture and equipment [Member]
Gross assets acquired on capital leases	$ 1,239

X

- Definition

Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 45
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+ References

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

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- Definition

Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.

+ References

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- Definition

Amount of reclassification, impairment, donation, or other change to long-lived, 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, furniture and fixtures, and computer equipment.

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The amount of interest that was capitalized on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.

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