Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Goodwill [Line Items]
Goodwill, Beginning Balance			$ 82,949
Acquisitions			78,680
Foreign currency translation impact			(90)
Impairment charges	$ (80,337)	$ 0	(80,337)	$ 0
Goodwill, Ending Balance	81,202		81,202
Rail Products and Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance			38,956
Acquisitions			8,772
Foreign currency translation impact			(90)
Impairment charges			0
Goodwill, Ending Balance	47,638		47,638
Construction Products [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance			5,147
Acquisitions			0
Foreign currency translation impact			0
Impairment charges			0
Goodwill, Ending Balance	5,147		5,147
Tubular and Energy Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance			38,846
Acquisitions			69,908
Foreign currency translation impact			0
Impairment charges			(80,337)
Goodwill, Ending Balance	$ 28,417		$ 28,417