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Revenue (Disaggregatation Of Revenue By Major Source) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Total revenues from contracts with customers	$ 288,586		$ 617,739
Revenues from contracts accounted for as derivatives under ASC 815	697,860		1,413,584
Leasing revenues under ASC Topic 840	391		801
Total revenues	986,837	$ 886,263	2,032,124	$ 1,773,947
Ethanol [Member]
Total revenues from contracts with customers	634		3,100
Revenues from contracts accounted for as derivatives under ASC 815	557,200		1,122,314
Distiller Grains [Member]
Total revenues from contracts with customers	62,657		119,902
Revenues from contracts accounted for as derivatives under ASC 815	82,646		144,319
Corn Oil [Member]
Revenues from contracts accounted for as derivatives under ASC 815	27,970		55,397
Grain [Member]
Revenues from contracts accounted for as derivatives under ASC 815	23,180		37,599
Cattle And Vinegar [Member]
Total revenues from contracts with customers	222,059		489,475
Revenues from contracts accounted for as derivatives under ASC 815	(1,522)		6,884
Service Revenues [Member]
Total revenues from contracts with customers	1,229		2,447
Other [Member]
Total revenues from contracts with customers	2,007		2,815
Revenues from contracts accounted for as derivatives under ASC 815	8,386		47,071
Ethanol Production [Member]
Total revenues from contracts with customers	65,367		125,871
Revenues from contracts accounted for as derivatives under ASC 815	528,108		1,033,320
Total revenues	593,475	618,846	1,159,191	1,240,221
Ethanol Production [Member] | Ethanol [Member]
Total revenues from contracts with customers	634		3,100
Revenues from contracts accounted for as derivatives under ASC 815	451,083		893,656
Ethanol Production [Member] | Distiller Grains [Member]
Total revenues from contracts with customers	62,657		119,902
Revenues from contracts accounted for as derivatives under ASC 815	49,940		90,401
Ethanol Production [Member] | Corn Oil [Member]
Revenues from contracts accounted for as derivatives under ASC 815	19,132		35,602
Ethanol Production [Member] | Grain [Member]
Revenues from contracts accounted for as derivatives under ASC 815	337		470
Ethanol Production [Member] | Other [Member]
Total revenues from contracts with customers	1,201		1,332
Revenues from contracts accounted for as derivatives under ASC 815	4,272		8,556
Ethanol Production [Member] | Intersegment Revenues [Member]
Total revenues from contracts with customers	875		1,537
Revenues from contracts accounted for as derivatives under ASC 815	3,344		4,635
Total revenues	4,219	1,549	6,172	3,045
Agribusiness And Energy Services [Member]
Total revenues from contracts with customers	806		1,483
Revenues from contracts accounted for as derivatives under ASC 815	183,396		395,935
Total revenues	184,202	160,536	397,418	338,339
Agribusiness And Energy Services [Member] | Ethanol [Member]
Revenues from contracts accounted for as derivatives under ASC 815	106,117		228,658
Agribusiness And Energy Services [Member] | Distiller Grains [Member]
Revenues from contracts accounted for as derivatives under ASC 815	32,706		53,918
Agribusiness And Energy Services [Member] | Corn Oil [Member]
Revenues from contracts accounted for as derivatives under ASC 815	3,488		12,158
Agribusiness And Energy Services [Member] | Grain [Member]
Revenues from contracts accounted for as derivatives under ASC 815	22,843		37,129
Agribusiness And Energy Services [Member] | Other [Member]
Total revenues from contracts with customers	806		1,483
Revenues from contracts accounted for as derivatives under ASC 815	4,114		38,515
Agribusiness And Energy Services [Member] | Intersegment Revenues [Member]
Revenues from contracts accounted for as derivatives under ASC 815	14,128		25,557
Total revenues	14,128	9,781	25,557	19,273
Food And Ingredients [Member]
Total revenues from contracts with customers	222,097		489,555
Revenues from contracts accounted for as derivatives under ASC 815	3,828		14,521
Total revenues	225,925	116,697	504,076	214,757
Food And Ingredients [Member] | Corn Oil [Member]
Revenues from contracts accounted for as derivatives under ASC 815	5,350		7,637
Food And Ingredients [Member] | Cattle And Vinegar [Member]
Total revenues from contracts with customers	222,059		489,475
Revenues from contracts accounted for as derivatives under ASC 815	(1,522)		6,884
Food And Ingredients [Member] | Intersegment Revenues [Member]
Total revenues from contracts with customers	38		80
Total revenues	38	37	80	75
Partnership [Member]
Total revenues from contracts with customers	1,229		2,447
Revenues from contracts accounted for as derivatives under ASC 815	2,517		4,689
Leasing revenues under ASC Topic 840	22,094		44,589
Total revenues	25,840	25,065	51,725	52,294
Partnership [Member] | Service Revenues [Member]
Total revenues from contracts with customers	1,229		2,447
Partnership [Member] | Intersegment Revenues [Member]
Revenues from contracts accounted for as derivatives under ASC 815	2,517		4,689
Total revenues	24,220	23,514	48,477	49,271
Intersegment Eliminations [Member]
Total revenues from contracts with customers	(913)		(1,617)
Revenues from contracts accounted for as derivatives under ASC 815	(19,989)		(34,881)
Leasing revenues under ASC Topic 840	(21,703)		(43,788)
Total revenues	(42,605)	$ (34,881)	(80,286)	$ (71,664)
Intersegment Eliminations [Member] | Intersegment Revenues [Member]
Total revenues from contracts with customers	(913)		(1,617)
Revenues from contracts accounted for as derivatives under ASC 815	$ (19,989)		$ (34,881)

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