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Inventories (Details) $ in Thousands, bu in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) bu | Mar. 31, 2019 USD ($) bu | Dec. 31, 2019 USD ($) bu
Inventory [Line Items] |  |  |
Grain and other agricultural products | $ 750,281 | $ 812,361 | $ 907,482
Frac sand and propane | 5,723 | 8,172 | 15,438
Ethanol and co-products | 87,706 | 16,302 | 95,432
Plant nutrients and cob products | 178,028 | 183,886 | 146,164
Railcar repair parts | 6,338 | 5,744 | 6,020
Total inventories | $ 1,028,076 | $ 1,026,465 | $ 1,170,536
Bushels of grain held in storage for others and excluded from inventory calculations | bu | 3.9 | 1.9 | 6.4
Inventory write down | $ 10,571 | $ 0 |
COVID-19 Pandemic |  |  |
Inventory [Line Items] |  |  |
Inventory write down | $ 10,600 |  |

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