Percentage of goodwill value eliminated due to impairment.

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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

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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		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Goodwill, Impairment Loss			$ 61,142
Finite-Lived Intangible Assets, Gross	$ 87,661		87,661		$ 158,740
Amortization of Intangible Assets	1,763	$ 3,337	$ 7,818	$ 8,950
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			$ 32,725
Finite-Lived Intangible Assets, Gross	57,134		$ 57,134		59,226
Rail Technologies [Member]
Goodwill, Impairment Loss	4,383
Percent of goodwill eliminated			68.00%
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	29,179		29,179		$ 98,166
Inspection Oilfield Services (IOS) [Member]
Impairment of Intangible Assets, Finite-lived			42,982
Chemtec Energy Services, LLC [Member]
Goodwill, Impairment Loss			61,142
Impairment of Intangible Assets, Finite-lived	$ 2,563		$ 16,804