Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenues	$ 8,208,436	$ 8,170,191	$ 3,045,382
Interest expense (income)	51,275	59,691	27,848
Equity in earnings (losses) of affiliates, net	638	(7,359)	27,141
Other income, net	20,448	20,109	16,002
Income (loss) before income taxes attributable to the Company	(24,474)	28,111	53,156
Income (Loss) from Continuing Operations before Income Taxes, Net of Noncontrolling Interest	(2,549)	31,358	53,415
Identifiable assets	4,272,121	3,900,741
Capital expenditures	77,147	160,984	142,579
Depreciation and amortization	188,638	146,166	90,297
Operating Segments | Trade
Segment Reporting Information [Line Items]
Total revenues	6,141,402	6,144,526	1,433,660
Interest expense (income)	(21,974)	(34,843)	(11,845)
Equity in earnings (losses) of affiliates, net	638	(6,835)	12,932
Other income, net	11,954	11,142	843
Income (loss) before income taxes attributable to the Company	24,687	(17,328)	21,715
Identifiable assets	2,486,412	2,012,060
Capital expenditures	14,911	31,173	17,203
Depreciation and amortization	44,627	50,973	16,062
Operating Segments | Ethanol
Segment Reporting Information [Line Items]
Total revenues	1,260,259	1,211,997	747,009
Interest expense (income)	(7,461)	(943)	1,890
Equity in earnings (losses) of affiliates, net	0	(524)	14,209
Other income, net	2,795	913	2,766
Income (loss) before income taxes attributable to the Company	(25,413)	50,907	27,076
Identifiable assets	666,839	690,548
Capital expenditures	39,791	104,023	101,320
Depreciation and amortization	73,224	23,727	6,136
Operating Segments | Plant Nutrient
Segment Reporting Information [Line Items]
Total revenues	662,959	646,730	690,536
Interest expense (income)	(5,805)	(7,954)	(6,499)
Other income, net	1,274	4,903	2,495
Income (loss) before income taxes attributable to the Company	16,015	9,159	12,030
Identifiable assets	374,653	383,781
Capital expenditures	16,565	20,413	15,723
Depreciation and amortization	25,407	25,985	26,871
Operating Segments | Rail
Segment Reporting Information [Line Items]
Total revenues	143,816	166,938	174,177
Interest expense (income)	(17,491)	(16,486)	(11,377)
Other income, net	2,885	1,583	3,516
Income (loss) before income taxes attributable to the Company	2,607	15,090	17,379
Identifiable assets	676,154	693,931
Capital expenditures	4,422	1,827	5,295
Depreciation and amortization	35,573	34,122	29,164
Other
Segment Reporting Information [Line Items]
Interest expense (income)	1,456	535	(17)
Other income, net	1,540	1,568	6,382
Income (loss) before income taxes attributable to the Company	(20,445)	(26,470)	(24,785)
Identifiable assets	68,063	120,421
Capital expenditures	1,458	3,548	3,038
Depreciation and amortization	9,807	11,359	12,064
Non-controlling interest
Segment Reporting Information [Line Items]
Income (loss) before income taxes attributable to the Company	(21,925)	(3,247)	(259)
UNITED STATES | Trade
Segment Reporting Information [Line Items]
Total revenues	6,315,055	6,350,643	2,832,007
Canada | Trade
Segment Reporting Information [Line Items]
Total revenues	526,143	666,289	136,439
MEXICO | Trade
Segment Reporting Information [Line Items]
Total revenues	246,523	294,644	34
Other | Trade
Segment Reporting Information [Line Items]
Total revenues	$ 1,120,715	$ 858,615	$ 76,902