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Related Party Transactions (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 26, 2016 | Jun. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jul. 03, 2017
Related Party Transaction [Line Items] |  |  |  |  |  |
Cost of sales, related party transactions |  |  | $ 0 | $ 18,425 | $ 29,596 |
Return of equity method investment |  |  |  | 22,832 |  |
Distributions received from equity method investee |  |  | $ 0 | 7,131 | 3,300 |
Equity method ownership percentage |  |  |  |  |  | 30.00%
Illinois Corn Processings LLC |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Return of equity method investment |  | $ 7,430 |  |  |  |
Illinois Corn Processings LLC |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Distributions received from equity method investee | $ 3,300 |  |  |  |  |
Equity method ownership percentage | 30.00% |  |  |  |  | 30.00%
ICP |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Cost of sales, related party transactions |  |  |  | $ 18,425 | $ 29,596 |

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