INCOME TAXES AFMC for CBPC exchange - Narrative (Details) (USD $)	3 Months Ended		6 Months Ended			12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2009 tax_credit	Dec. 31, 2009 Alternative Fuel Mixture Credit [Member]	Jun. 30, 2014 Cellulosic Biofuel Producer Credit [Member]	Dec. 31, 2009 Cellulosic Biofuel Producer Credit [Member]	Mar. 31, 2013 Exchange of Alternative Fuel Tax Benefit [Member] gal
AFMC for CBPC Exchange [Line Items]
Number of tax credits					2
Tax Credit Amount per Gallon						0.50		1.01
Tax payment									$ 70,000,000
Gallons Exchanged									120,000,000
Expected Income Tax Benefit									19,000,000
Valuation Allowance	$ 15,574,000	$ 0	$ 15,574,000	$ 0			$ 16,000,000