Stockholders' Equity (Schedule of Reclassification From AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Gains (losses) on cash flow hedges	$ 4,869	$ (301,583)	$ (122,588)
Income tax expense (benefit)	1,855	(139,754)	(46,941)
Amounts reclassified from accumulated other comprehensive income (loss)	3,014	(161,829)	(75,647)
Revenue [Member] \| Ethanol Commodity Derivatives [Member]
Gains (losses) on cash flow hedges	8,420	(257,730)	(96,736)
Cost of goods sold [Member] \| Corn Commodity Derivatives [Member]
Gains (losses) on cash flow hedges	(3,551)	(43,853)	(25,852)
Income (loss) before income taxes [Member]
Gains (losses) on cash flow hedges	4,869	(301,583)	(122,588)
Income tax expense (benefit) [Member]
Income tax expense (benefit)	$ 1,855	$ (139,754)	$ (46,941)

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

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=35706170&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
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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=36458714&loc=d3e689-108580

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-Publisher FASB
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-Publisher FASB
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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
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