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Business Segments - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting Information |  |
Total net sales | $ 128,775 | $ 150,469
Segment Profit (Loss) | 144 | 9,001
Rail Products and Services |  |
Segment Reporting Information |  |
Total net sales | 70,204 | 75,694
Segment Profit (Loss) | 1,171 | 3,479
Construction Products |  |
Segment Reporting Information |  |
Total net sales | 29,034 | 37,345
Segment Profit (Loss) | (1,639) | 834
Tubular and Energy Services |  |
Segment Reporting Information |  |
Total net sales | 29,537 | 37,430
Segment Profit (Loss) | $ 612 | $ 4,688

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
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