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Stockholders Equity (Reclassification From Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on cash flow hedges	$ (3,294)	$ 1,450	$ (3,875)	$ (1,120)
Income tax expense (benefit)	(1,144)	547	(1,369)	(420)
Amounts reclassified from accumulated other comprehensive income (loss)	(2,150)	903	(2,506)	(700)
Revenue [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on cash flow hedges	25,254	935	12,029	4,643
Revenue [Member] | Ethanol Commodity Derivatives [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on cash flow hedges	25,254	935	12,029	4,643
Cost of Goods Sold [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on cash flow hedges	(28,548)	515	(15,904)	(5,763)
Cost of Goods Sold [Member] | Corn Commodity Derivatives [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on cash flow hedges	(28,548)	515	(15,904)	(5,763)
Income (loss) before income taxes [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on cash flow hedges	(3,294)	1,450	(3,875)	(1,120)
Income tax expense (benefit) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense (benefit)	$ (1,144)	$ 547	$ (1,369)	$ (420)

X

- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624177-113959

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Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41638-113959

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e640-108580

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-URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41638-113959

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