Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 81,752
Foreign currency translation impact	(198)
Goodwill, Ending Balance	81,554
Rail Products and Services [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	48,188
Foreign currency translation impact	(198)
Goodwill, Ending Balance	47,990
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	28,417
Foreign currency translation impact	0
Goodwill, Ending Balance	$ 28,417