Goodwill and Other Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill, Acquired During Period	$ 16,544
Goodwill	57,781	41,237
Finite-Lived Intangible Assets, Gross	60,967	46,811
Intangible Assets, Net (Excluding Goodwill)	51,846	40,165
Amortization of Intangible Assets	3,112	2,961	2,791
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	25 years
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Weighted Average [Member]
Finite-Lived Intangible Asset, Useful Life	17 years
Rail Products Segment [Member]
Goodwill	38,026	38,026
Goodwill, Written off Related to Sale of Business Unit		2,588
Indefinite-lived Intangible Assets, Written off Related to Sale of Business Unit		177
Finite-Lived Intangible Assets, Gross	44,455	44,506
Construction Products Segment [Member]
Goodwill	3,211	3,211
Finite-Lived Intangible Assets, Gross	1,830	2,305
Tubular Products Segments [Member]
Goodwill	16,544
Finite-Lived Intangible Assets, Gross	$ 14,682

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

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

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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.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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

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Amount of write-off of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit associated with the sale of all or a portion of a reporting unit.

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