Segment Information (Summary Of Financial Data) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenues		$ 724,418	$ 388,024	$ 1,278,058	$ 1,020,893
Cost of goods sold		639,408	360,896	1,148,641	978,124
Operating income (loss)		31,033	(19,368)	62,380	(73,696)
Depreciation and amortization		20,532	19,375	41,213	37,455
Gain (loss) on disposal of assets		(3,825)		33,068
Goodwill impairment					24,091
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		748,461	411,414	1,326,533	1,070,599
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues		(24,043)	(23,390)	(48,475)	(49,706)
Cost of goods sold		(24,429)	(19,081)	(46,795)	(47,505)
Operating income (loss)		386	(4,283)	(1,680)	(2,150)
Ethanol Production [Member]
Segment Reporting Information [Line Items]
Revenues		555,273	290,542	978,995	766,267
Goodwill impairment					24,100
Ethanol Production [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		555,273	290,517	978,995	766,217
Cost of goods sold		493,656	284,174	909,181	773,324
Operating income (loss)	[1]	33,543	(18,792)	13,223	(79,573)
Depreciation and amortization		18,483	17,184	37,011	33,082
Ethanol Production [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues			(25)		(50)
Agribusiness and Energy Services [Member]
Segment Reporting Information [Line Items]
Revenues		173,487	100,491	307,431	263,680
Agribusiness and Energy Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		167,975	96,123	296,796	252,004
Cost of goods sold		170,181	95,803	286,255	252,305
Operating income (loss)		(851)	351	12,495	2,911
Depreciation and amortization		595	556	1,202	1,109
Agribusiness and Energy Services [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues		(5,512)	(4,368)	(10,635)	(11,676)
Partnership [Member]
Segment Reporting Information [Line Items]
Revenues		19,701	20,381	40,107	40,652
Partnership [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		1,170	1,384	2,267	2,672
Operating income (loss)		11,916	12,225	24,787	24,655
Depreciation and amortization		795	966	1,682	1,927
Partnership [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues		(18,531)	(18,997)	(37,840)	(37,980)
Corporate Activities [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	[2]	(13,961)	(8,869)	13,555	(19,539)
Depreciation and amortization		659	$ 669	1,318	$ 1,337
Gain (loss) on disposal of assets		$ (3,800)		$ 33,100

[1] Operating loss for ethanol production includes a goodwill impairment charge of $24.1 million for the six months ended June 30, 2020.

[2] Corporate activities for the three and six months ended June 30, 2021 include a $3.8 million loss on sale of assets and a $33.1 million gain on sale of assets, respectively.