Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues from external customers	$ 1,982,755	$ 685,579	$ 6,284,588	$ 2,232,720
Income (loss) before income taxes, net of noncontrolling interest	(11,449)	(3,862)	10,001	23,400
Net income (loss) attributable to the noncontrolling interests	(1,633)	223	(2,265)	(175)
Income (loss) before income taxes	(13,082)	(3,639)	7,736	23,225
Total assets	3,284,452	2,151,618	3,284,452	2,151,618	$ 2,392,003
Operating Segments \| Trade
Segment Reporting Information [Line Items]
Revenues from external customers	1,580,157	342,610	4,944,483	983,737
Income (loss) before income taxes, net of noncontrolling interest	(2,001)	(9,914)	4,268	(2,453)
Total assets	1,712,350	773,923	1,712,350	773,923	964,079
Operating Segments \| Ethanol
Segment Reporting Information [Line Items]
Revenues from external customers	254,055	195,669	708,029	571,090
Income (loss) before income taxes, net of noncontrolling interest	949	10,353	6,169	20,703
Total assets	372,663	278,796	372,663	278,796	310,866
Operating Segments \| Plant Nutrient
Segment Reporting Information [Line Items]
Revenues from external customers	109,446	104,188	508,548	542,911
Income (loss) before income taxes, net of noncontrolling interest	(7,440)	(7,976)	4,534	8,239
Total assets	376,615	415,314	376,615	415,314	403,780
Operating Segments \| Rail
Segment Reporting Information [Line Items]
Revenues from external customers	39,097	43,112	123,528	134,982
Income (loss) before income taxes, net of noncontrolling interest	3,137	5,732	10,629	10,645
Total assets	679,056	564,227	679,056	564,227	590,407
Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenues from external customers	1,958	730	6,109	2,394
Segment Reconciling Items \| Trade
Segment Reporting Information [Line Items]
Revenues from external customers	242	442	1,054	1,435
Segment Reconciling Items \| Plant Nutrient
Segment Reporting Information [Line Items]
Revenues from external customers	892	0	2,186	0
Segment Reconciling Items \| Rail
Segment Reporting Information [Line Items]
Revenues from external customers	824	288	2,869	959
Other
Segment Reporting Information [Line Items]
Income (loss) before income taxes, net of noncontrolling interest	(6,094)	(2,057)	(15,599)	(13,734)
Total assets	$ 143,768	$ 119,358	$ 143,768	$ 119,358	$ 122,871

Income (Loss) from Continuing Operations before Income Taxes, Net of Noncontrolling Interest

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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