Business Segments (Reconciliation of Significant Reconciling Items) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 176,059		$ 167,797	$ 485,385		$ 446,043
Segment Profit	(68,433)		16,445	(47,246)		36,496
Rail Products and Services [Member]
Segment Reporting Information [Line Items]
Net sales	87,972		102,105	252,530		283,085
Segment Profit	6,984		11,533	19,469		23,685
Construction Products [Member]
Segment Reporting Information [Line Items]
Net sales	54,093		49,907	137,899		119,100
Segment Profit	4,456		3,251	10,842		7,838
Tubular and Energy Services [Member]
Segment Reporting Information [Line Items]
Net sales	33,994		15,785	94,956		43,858
Segment Profit	$ (79,873)	[1]	$ 1,661	$ (77,557)	[1]	$ 4,973

[1] Segment profit includes impairment of goodwill as further described in Note 4.