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Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | $ 90,501 | $ 88,252 | $ 179,597 | $ 176,208
Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 74,023 | 72,652 | 148,600 | 147,029
Ingredient solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 16,478 | 15,600 | 30,997 | 29,179
Premium beverage alcohol | Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 42,312 | 42,200 | 84,321 | 86,271
Brown goods | Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 27,621 | 27,736 | 52,448 | 55,937
White goods | Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 14,691 | 14,464 | 31,873 | 30,334
Industrial alcohol | Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 20,636 | 19,295 | 41,079 | 38,639
Food grade alcohol | Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 62,948 | 61,495 | 125,400 | 124,910
Fuel grade alcohol | Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 1,398 | 1,567 | 2,899 | 3,430
Distillers feed and related co-products | Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 6,181 | 6,663 | 13,276 | 12,887
Warehouse services | Distillery products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 3,496 | 2,927 | 7,025 | 5,802
Specialty wheat starches | Ingredient solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 7,210 | 7,339 | 14,090 | 14,140
Specialty wheat proteins | Ingredient solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 5,276 | 6,008 | 9,718 | 10,744
Commodity wheat starches | Ingredient solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | 3,013 | 2,090 | 5,275 | 4,132
Commodity wheat proteins | Ingredient solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Sales (Note 2) | $ 979 | $ 163 | $ 1,914 | $ 163

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