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Sales (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Sales	$ 108,323	$ 99,082
Distillery Products
Disaggregation of Revenue [Line Items]
Sales	89,194	80,002
Ingredient Solutions
Disaggregation of Revenue [Line Items]
Sales	19,129	19,080
Premium beverage alcohol | Distillery Products
Disaggregation of Revenue [Line Items]
Sales	60,268	45,972
Brown goods | Distillery Products
Disaggregation of Revenue [Line Items]
Sales	43,415	29,070
White goods | Distillery Products
Disaggregation of Revenue [Line Items]
Sales	16,853	16,902
Industrial alcohol | Distillery Products
Disaggregation of Revenue [Line Items]
Sales	17,336	21,618
Food grade alcohol | Distillery Products
Disaggregation of Revenue [Line Items]
Sales	77,604	67,590
Fuel grade alcohol | Distillery Products
Disaggregation of Revenue [Line Items]
Sales	2,517	1,522
Distillers feed and related co-products | Distillery Products
Disaggregation of Revenue [Line Items]
Sales	4,972	6,989
Warehouse services | Distillery Products
Disaggregation of Revenue [Line Items]
Sales	4,101	3,901
Specialty wheat starches | Ingredient Solutions
Disaggregation of Revenue [Line Items]
Sales	10,222	10,212
Specialty wheat proteins | Ingredient Solutions
Disaggregation of Revenue [Line Items]
Sales	6,046	6,365
Commodity wheat starches | Ingredient Solutions
Disaggregation of Revenue [Line Items]
Sales	2,283	1,877
Commodity wheat proteins | Ingredient Solutions
Disaggregation of Revenue [Line Items]
Sales	$ 578	$ 626

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