v2.4.0.8
Business Segments (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Segment Reporting Information [Line Items]          
Total Assets $ 1,872,009   $ 1,872,009   $ 1,992,465
External Revenues 4,785,740 4,965,989 14,185,508 14,657,945  
Net income attributable to common stockholders 41,729 11,001 141,404 64,510  
Operating Segments [Member]
         
Segment Reporting Information [Line Items]          
Total Assets 1,845,269   1,845,269    
External Revenues 4,785,740 4,965,989 14,185,508 14,657,945  
Net income attributable to common stockholders 45,375 11,120 144,857 65,857  
Operating Segments [Member] | Marketing [Member]
         
Segment Reporting Information [Line Items]          
Total Assets 1,724,050   1,724,050    
External Revenues 4,622,034 4,788,186 13,673,809 14,188,576  
Net income attributable to common stockholders 40,922 20,512 130,862 81,143  
Operating Segments [Member] | Ethanol [Member]
         
Segment Reporting Information [Line Items]          
Total Assets 121,219   121,219    
External Revenues 163,706 177,803 511,699 469,369  
Net income attributable to common stockholders 4,453 (9,392) 13,995 (15,286)  
Operating Segments [Member] | Corporate [Member]
         
Segment Reporting Information [Line Items]          
Total Assets 26,740   26,740    
Net income attributable to common stockholders $ (3,646) $ (119) $ (3,453) $ (1,347)