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Business Segments (Reconciliation of Significant Reconciling Items) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 135,994 | $ 171,419 | $ 262,304 | $ 309,326
Segment Profit (Loss) | (124,207) | 11,929 | (124,945) | 21,187
Rail Products and Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 67,503 | 86,882 | 131,795 | 164,558
Segment Profit (Loss) | (25,168) | 6,413 | (24,427) | 12,485
Construction Products [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 40,348 | 49,516 | 72,228 | 83,806
Segment Profit (Loss) | 3,944 | 5,158 | 4,392 | 6,386
Tubular and Energy Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 28,143 | 35,021 | 58,281 | 60,962
Segment Profit (Loss) | $ (102,983) | $ 358 | $ (104,910) | $ 2,316

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