The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Goodwill [Line Items]
Goodwill Purchase Accounting Adjustments		$ 1,069
Goodwill	$ 17,249	14,993	$ 13,924
Amortization Expense	$ 381	635	$ 452
Business Acquistion Miscor [Member] \| Infrastructure Solutions [Member]
Goodwill [Line Items]
Goodwill Purchase Accounting Adjustments		1,069
Goodwill		6,362
Business Acquistion Miscor [Member] \| Deferred Tax Liability [Member] \| Infrastructure Solutions [Member]
Goodwill [Line Items]
Change In Accounting Estimate Description	is the result of the completion of our analysis of the tax basis of the acquired property, plant and equipment, which resulted in the recording of an additional deferred tax liability
Goodwill Purchase Accounting Adjustments		560
Business Acquistion Miscor [Member] \| Work In Process Inventory [Member] \| Infrastructure Solutions [Member]
Goodwill [Line Items]
Change In Accounting Estimate Description	we completed our valuation of the acquired inventory, resulting in a $311 reduction in the estimated value previously attributed to work in process inventory.
Goodwill Purchase Accounting Adjustments		311
Business Acquistion Miscor [Member] \| Current Liabilities [Member] \| Infrastructure Solutions [Member]
Goodwill [Line Items]
Change In Accounting Estimate Description	We also identified additional current liabilities of $198, resulting in a further increase to goodwill.
Goodwill Purchase Accounting Adjustments		$ 198