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SEGMENTS - Reportable Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Net sales |  |  |  |
Total net sales | $ 482,566 | $ 351,584 | $ 1,323,991 | $ 1,077,811
Income (loss) from operations | 18,263 | 8,408 | 52,162 | (95,649)
Transportation Solutions |  |  |  |
Net sales |  |  |  |
Total net sales | 441,258 | 306,183 | 1,186,909 | 948,270
Parts & Service |  |  |  |
Net sales |  |  |  |
Total net sales | 41,308 | 45,401 | 137,082 | 129,541
Corporate and Eliminations |  |  |  |
Net sales |  |  |  |
Total net sales | (1,973) | (3,031) | (5,205) | (10,827)
Income (loss) from operations | (11,855) | (10,992) | (35,839) | (31,085)
Corporate and Eliminations | Transportation Solutions |  |  |  |
Net sales |  |  |  |
Total net sales | 1,378 | 1,174 | 3,264 | 5,879
Corporate and Eliminations | Parts & Service |  |  |  |
Net sales |  |  |  |
Total net sales | 595 | 1,857 | 1,941 | 4,948
Operating Segments | Transportation Solutions |  |  |  |
Net sales |  |  |  |
Total net sales | 442,636 | 307,357 | 1,190,173 | 954,149
Income (loss) from operations | 25,970 | 13,522 | 69,492 | (43,098)
Operating Segments | Parts & Service |  |  |  |
Net sales |  |  |  |
Total net sales | 41,903 | 47,258 | 139,023 | 134,489
Income (loss) from operations | $ 4,148 | $ 5,878 | $ 18,509 | $ (21,466)

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