Segment Information (Schedule Of Revenues By Product) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 739,914	$ 742,797	$ 744,490	$ 738,388	$ 829,939	$ 833,925	$ 837,858	$ 733,889	$ 2,965,589	$ 3,235,611	$ 3,041,011
Ethanol [Member]
Segment Reporting Information [Line Items]
Revenues									1,868,043	2,362,812	2,330,884
Distillers grains [Member]
Segment Reporting Information [Line Items]
Revenues									474,699	531,696	488,376
Corn oil [Member]
Segment Reporting Information [Line Items]
Revenues									101,126	99,167	74,251
Grain [Member]
Segment Reporting Information [Line Items]
Revenues									240,466	174,997	92,487
Cattle [Member]
Segment Reporting Information [Line Items]
Revenues									219,046	29,262
Service revenues [Member]
Segment Reporting Information [Line Items]
Revenues									8,388	8,484	7,179
Other [Member]
Segment Reporting Information [Line Items]
Revenues									$ 53,821	$ 29,193	$ 47,834