Business Segments (Reconciliation of Significant Reconciling Items) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 126,310	$ 137,907
Segment Profit (Loss)	(738)	9,258
Rail Products and Services [Member]
Segment Reporting Information [Line Items]
Net sales	64,292	77,676
Segment Profit (Loss)	741	6,072
Construction Products [Member]
Segment Reporting Information [Line Items]
Net sales	31,880	34,290
Segment Profit (Loss)	448	1,228
Tubular and Energy Services [Member]
Segment Reporting Information [Line Items]
Net sales	30,138	25,941
Segment Profit (Loss)	$ (1,927)	$ 1,958