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Inventories (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Inventories |  |
Finished goods | $ 86,654 | $ 50,416
Work-in-process | 11,894 | 8,916
Raw material and supplies | 45,291 | 44,687
Inventories | 143,839 | 104,019
Inventories - truck chassis floor plan | $ 1,469 | $ 2,655

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