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Document and Entity Information (USD $)
 12 Months Ended
Jan. 03, 2015
Feb. 19, 2015
Jul. 05, 2014
Document and Entity Information [Abstract]      
Entity Registrant Name BlueLinx Holdings Inc.    
Entity Central Index Key 0001301787    
Trading Symbol bxc    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Current Fiscal Year End Date --01-03    
Entity Filer Category Smaller Reporting Company    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding   89,416,236dei_EntityCommonStockSharesOutstanding  
Entity Public Float     $ 34,205,977dei_EntityPublicFloat
Document Type 10-K    
Document Period End Date Jan. 03, 2015    
Amendment Flag false    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY