[Line Items] for AFMC for CBPC Exchange [Table]

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- Definition

Number of Tax Credits

+ References

No definition available.

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- Definition

Tax Credit Amount per Gallon

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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- Definition

A credit or adjustment for government or taxing authority authorized decrease in taxes owed as a result of meeting certain tax policy conditions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318

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Income Taxes - AFMC and CBPC - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2009 tax_credit $ / gal
AFMC for CBPC Exchange [Line Items]
Number of tax credits \| tax_credit				2
Valuation allowance adjustment	$ 3,607	$ 0	$ 0
Valuation allowance	18,248	13,644
Alternative Fuel Mixture Credit
AFMC for CBPC Exchange [Line Items]
Tax credit amount per gallon (USD per gallon) \| $ / gal				0.50
Cellulosic Biofuel Producer Credit
AFMC for CBPC Exchange [Line Items]
Tax credit amount per gallon (USD per gallon) \| $ / gal				1.01
Valuation allowance adjustment	1,000
Valuation allowance	$ 14,600	$ 13,600
Exchange of Alternative Fuel Tax Benefit
AFMC for CBPC Exchange [Line Items]
Net tax benefit from AFMC for CBPC exchange			$ 18,800