Quarterly report pursuant to sections 13 or 15(d)

Document Entity Information

Document Entity Information
3 Months Ended
Mar. 31, 2012
May 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 Mar. 31, 2012  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   56,190,964