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Cover Page
May 04, 2021
Mar. 03, 2021
Cover [Abstract]    
Document Type 8-K  
Document Period End Date May 04, 2021  
Entity Registrant Name BlueLinx Holdings Inc  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-32383  
Entity Tax Identification Number 77-0627356  
Entity Address, Address Line One 1950 Spectrum Circle  
Entity Address, Address Line Two Suite 300  
Entity Address, City or Town Marietta  
Entity Address, State or Province GA  
Entity Address, Postal Zip Code 30067  
City Area Code 770  
Local Phone Number 953-7000  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Emerging Growth Company false  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol BXC  
Security Exchange Name NYSE  
Amendment Flag   false
Entity Central Index Key   0001301787