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Inventories (Details) $ in Thousands, bu in Millions | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) bu
--- | --- | ---
Inventory, Net [Abstract] |  |
Grain | $ 527,471 | $ 505,217
Ethanol and co-products | 11,918 | 11,003
Plant nutrients and cob products | 145,693 | 126,962
Railcar repair parts | 5,722 | 5,521
Total inventories | $ 690,804 | $ 648,703
Grain held in storage and excluded from inventory calculations (bushels) | bu |  | 1.0

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