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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, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Segment Reporting Information |  |  |  |
Total net sales | $ 131,515 | $ 154,522 | $ 230,309 | $ 270,602
Operating profit | 2,480 | 4,924 | 193 | 4,263
Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 131,515 | 154,522 | 230,309 | 270,602
Operating profit | 4,635 | 7,619 | 2,735 | 8,797
Rail, Technologies, and Services |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 81,797 | 88,782 | 145,507 | 155,014
Rail, Technologies, and Services | Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 81,797 | 88,782 | 145,507 | 155,014
Operating profit | 3,998 | 5,657 | 5,037 | 7,879
Precast Concrete Products |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 23,611 | 20,073 | 38,621 | 32,751
Precast Concrete Products | Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 23,611 | 20,073 | 38,621 | 32,751
Operating profit | (125) | 1,148 | (916) | 1,031
Steel Products and Measurement |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 26,107 | 45,667 | 46,181 | 82,837
Steel Products and Measurement | Operating Segments |  |  |  |
Segment Reporting Information |  |  |  |
Total net sales | 26,107 | 45,667 | 46,181 | 82,837
Operating profit | $ 762 | $ 814 | $ (1,386) | $ (113)

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