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Inventories (Schedule of Inventory Current) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Inventories [Abstract] |  |
Work in process | $ 43,454 | $ 42,460
Finished new railcars |  | 85
Parts inventory | 3,231 | 2,747
Total inventories, net | $ 46,685 | $ 45,292

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