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Business Segments - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting Information |  |  |  |
Total net sales | $ 145,766 | $ 200,933 | $ 274,541 | $ 351,402
Segment Profit (Loss) | 3,217 | 16,351 |  |
Interest expense - net | (1,090) | (1,597) | (1,907) | (2,952)
Other income - net | (3,339) | 252 | (4,085) | 402
Pre-tax income | 1,616 | 11,249 | (1,078) | 15,577
Rail Products and Services |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 74,939 | 101,401 | 145,143 | 177,095
Segment Profit (Loss) | 5,816 | 7,919 |  |
Construction Products |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 42,008 | 55,406 | 71,042 | 92,751
Segment Profit (Loss) | 1,506 | 3,413 |  |
Tubular and Energy Services |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 28,819 | 44,126 | 58,356 | 81,556
Segment Profit (Loss) | (4,105) | 5,019 |  |
Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales |  |  | 274,541 | 351,402
Segment Profit (Loss) | 3,217 | 16,351 | 3,361 | 25,352
Interest expense - net | (1,090) | (1,597) | (1,907) | (2,952)
Other income - net | 2,292 | 252 | 2,427 | 402
Unallocated corporate expenses and other unallocated charges | (2,803) | (3,757) | (4,959) | (7,225)
Pre-tax income | $ 1,616 | $ 11,249 | (1,078) | 15,577
Operating Segments | Rail Products and Services |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales |  |  | 145,143 | 177,095
Segment Profit (Loss) |  |  | 6,987 | 11,398
Operating Segments | Construction Products |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales |  |  | 71,042 | 92,751
Segment Profit (Loss) |  |  | (133) | 4,247
Operating Segments | Tubular and Energy Services |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales |  |  | 58,356 | 81,556
Segment Profit (Loss) |  |  | $ (3,493) | $ 9,707

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