Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 18,932
Foreign currency translation impact	139
Goodwill, Ending Balance	19,071
Rail Products and Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	13,785
Foreign currency translation impact	139
Goodwill, Ending Balance	13,924
Construction Products [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	5,147
Foreign currency translation impact	0
Goodwill, Ending Balance	5,147
Tubular and Energy Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	0
Foreign currency translation impact	0
Goodwill, Ending Balance	$ 0