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Revenue - Disaggregation of Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Disaggregation of Revenue |  |  |  |
Total net sales | $ 130,015 | $ 130,053 | $ 360,324 | $ 400,655
Rail, Technologies, and Services |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | 77,350 | 73,942 | 222,857 | 228,956
Precast Concrete Products |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | 28,856 | 17,972 | 67,477 | 50,723
Steel Products and Measurement |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | 23,809 | 38,139 | 69,990 | 120,976
Rail Products and Global Friction Management | Rail, Technologies, and Services |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | 69,161 | 60,593 | 191,228 | 192,661
Technology Services and Solutions | Rail, Technologies, and Services |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | 8,189 | 13,349 | 31,629 | 36,295
Precast Concrete Buildings | Precast Concrete Products |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | 15,525 | 13,884 | 41,306 | 40,516
Other Precast Concrete Products | Precast Concrete Products |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | 13,331 | 4,088 | 26,171 | 10,207
Fabricated Steel Products | Steel Products and Measurement |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | 15,250 | 30,512 | 45,821 | 100,233
Coatings and Measurement | Steel Products and Measurement |  |  |  |
Disaggregation of Revenue |  |  |  |
Total net sales | $ 8,559 | $ 7,627 | $ 24,169 | $ 20,743

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