Percentage of goodwill value eliminated due to impairment.

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- Definition

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.

+ References

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Goodwill and Definite-Lived Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Goodwill, Impairment Loss			$ 56,759
Finite-Lived Intangible Assets, Gross	$ 90,560		90,560		$ 158,740
Amortization of Intangible Assets	2,789	$ 3,456	$ 6,055	$ 5,613
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life			25 years
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life			2 years
Weighted Average [Member]
Finite-Lived Intangible Asset, Useful Life			15 years
Rail Products and Services [Member]
Goodwill, Impairment Loss			$ 28,342
Finite-Lived Intangible Assets, Gross	57,470		$ 57,470		59,226
Rail Technologies [Member]
Percent of goodwill eliminated			60.00%
Construction Products [Member]
Goodwill, Impairment Loss			$ 0
Finite-Lived Intangible Assets, Gross	1,348		1,348		1,348
Tubular and Energy Services [Member]
Goodwill, Impairment Loss			28,417
Finite-Lived Intangible Assets, Gross	$ 31,742		31,742		$ 98,166
Inspection Oilfield Services (IOS) [Member]
Impairment of Intangible Assets, Finite-lived			42,982
Chemtec Energy Services, LLC [Member]
Goodwill, Impairment Loss			56,759
Impairment of Intangible Assets, Finite-lived			$ 14,241