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Derivatives (Comodity Derivative Contracts Outstanding) (Details) lb in Thousands, gal in Thousands, bu in Thousands, T in Thousands | Dec. 31, 2019 lb | Dec. 31, 2019 bu | Dec. 31, 2019 T | Dec. 31, 2019 gal | Dec. 31, 2018 lb | Dec. 31, 2018 bu | Dec. 31, 2018 T | Dec. 31, 2018 gal
--- | --- | --- | --- | --- | --- | --- | --- | ---
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 14,873 | 1,055,476 | 2,495 | 300,982 | 2,920 | 506,417 | 66 | 323,975
Non-exchange traded |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 14,873 | 724,330 | 2,263 | 120,448 | 2,920 | 313,612 | 66 | 246,863
Non-exchange traded | Corn |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 552,359 | 0 | 0 | 0 | 250,408 | 0 | 0
Non-exchange traded | Soybeans |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 34,912 | 0 | 0 | 0 | 22,463 | 0 | 0
Non-exchange traded | Wheat |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 100,996 | 0 | 0 | 0 | 14,017 | 0 | 0
Non-exchange traded | Oats |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 24,700 | 0 | 0 | 0 | 26,230 | 0 | 0
Non-exchange traded | Ethanol |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 0 | 0 | 116,448 | 0 | 0 | 0 | 244,863
Non-exchange traded | Corn oil |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 14,568 | 0 | 0 | 0 | 2,920 | 0 | 0 | 0
Non-exchange traded | Other |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 305 | 11,363 | 2,263 | 4,000 | 0 | 494 | 66 | 2,000
Exchange traded |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 331,146 | 232 | 180,534 | 0 | 192,805 | 0 | 77,112
Exchange traded | Corn |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 221,740 | 0 | 0 | 0 | 130,585 | 0 | 0
Exchange traded | Soybeans |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 39,145 | 0 | 0 | 0 | 26,985 | 0 | 0
Exchange traded | Wheat |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 68,171 | 0 | 0 | 0 | 33,760 | 0 | 0
Exchange traded | Oats |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 2,090 | 0 | 0 | 0 | 1,475 | 0 | 0
Exchange traded | Ethanol |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 0 | 0 | 175,353 | 0 | 0 | 0 | 77,112
Exchange traded | Propane [Member] |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 0 | 0 | 5,166 |  |  |  |
Exchange traded | Other |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount | 0 | 0 | 232 | 15 |  |  |  |

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