Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information Document

v2.4.0.8
Document and Entity Information Document
9 Months Ended
Sep. 30, 2014
Oct. 24, 2014
Document Information [Line Items]    
Entity Registrant Name Alon USA Energy, Inc.  
Entity Central Index Key 0001325955  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   69,606,019