Quarterly report pursuant to sections 13 or 15(d)

Document Entity Information

Document Entity Information
9 Months Ended
Sep. 30, 2012
Nov. 01, 2012
Document and Entity Information    
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, 2012  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   61,272,429