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Document and Entity Information (USD $)
 12 Months Ended
Dec. 31, 2011
Feb. 24, 2012
Jul. 02, 2011
Document and Entity Information [Abstract]      
Entity Registrant Name BlueLinx Holdings Inc.    
Entity Central Index Key 0001301787    
Document Type 10-K    
Document Period End Date Dec. 31, 2011    
Amendment Flag false    
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 26,336,336
Entity Common Stock, Shares Outstanding   63,726,094