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Derivatives (Comodity Derivative Contracts Outstanding) (Details) lb in Thousands, gal in Thousands, bu in Thousands, T in Thousands | Dec. 31, 2018 lb | Dec. 31, 2018 bu | Dec. 31, 2018 T | Dec. 31, 2018 gal | Dec. 31, 2017 lb | Dec. 31, 2017 bu | Dec. 31, 2017 T | Dec. 31, 2017 gal
--- | --- | --- | --- | --- | --- | --- | --- | ---
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 2,920 | 506,417 | 66 | 323,975 | 6,074 | 464,085 | 97 | 237,885
Non-exchange traded |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 2,920 | 313,612 | 66 | 246,863 | 6,074 | 277,095 | 97 | 197,607
Non-exchange traded | Corn |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount |  | 250,408 | 0 |  |  | 218,391 | 0 |
Non-exchange traded | Soybeans |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 22,463 | 0 | 0 | 0 | 18,127 | 0 | 0
Non-exchange traded | Wheat |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 14,017 | 0 | 0 | 0 | 14,577 | 0 | 0
Non-exchange traded | Oats |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 26,230 | 0 | 0 | 0 | 25,953 | 0 | 0
Non-exchange traded | Ethanol |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 0 | 0 | 244,863 | 0 | 0 | 0 | 197,607
Non-exchange traded | Corn oil |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 2,920 | 0 | 0 | 0 | 6,074 | 0 | 0 | 0
Non-exchange traded | Other |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 494 | 66 | 2,000 | 0 | 47 | 97 | 0
Exchange traded |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 192,805 | 0 | 77,112 | 0 | 186,990 | 0 | 40,278
Exchange traded | Corn |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 130,585 | 0 | 0 | 0 | 82,835 | 0 | 0
Exchange traded | Soybeans |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 26,985 | 0 | 0 | 0 | 37,170 | 0 | 0
Exchange traded | Wheat |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 33,760 | 0 | 0 | 0 | 65,640 | 0 | 0
Exchange traded | Oats |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 1,475 | 0 | 0 | 0 | 1,345 | 0 | 0
Exchange traded | Ethanol |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 0 | 0 | 77,112 | 0 | 0 | 0 | 39,438
Exchange traded | Other |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |
Nonmonetary notional amount |  |  |  |  | 0 | 0 | 0 | 840

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