Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

Document And Entity Information (USD $)
12 Months Ended
Dec. 31, 2011
Jun. 30, 2011
Feb. 29, 2012
Common Stock [Member]
Feb. 29, 2012
Common Class A [Member]
Document Type 10-K      
Amendment Flag false      
Document Period End Date Dec. 31, 2011      
Document Fiscal Year Focus 2011      
Document Fiscal Period Focus FY      
Entity Registrant Name Renewable Energy Group, Inc.      
Entity Central Index Key 0001463258      
Current Fiscal Year End Date --12-31      
Entity Filer Category Non-accelerated Filer      
Entity Common Stock, Shares Outstanding     7,200,000 21,605,407
Entity Well-known Seasoned Issuer No      
Entity Current Reporting Status Yes      
Entity Voluntary Filers No      
Entity Public Float   $ 0