Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill, Beginning Balance		$ 82,949
Acquisitions		79,502
Foreign currency translation impact		(362)
Impairment charges	$ (80,337)	(80,337)	$ 0	$ 0
Goodwill, Ending Balance		81,752	82,949
Rail Products and Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance		38,956
Acquisitions		9,594
Foreign currency translation impact		(362)
Impairment charges		0
Goodwill, Ending Balance		48,188	38,956
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	$ 38,846