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Document and Entity Information
Oct. 31, 2019
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001316835
Document Type 8-K
Document Period End Date Oct. 31, 2019
Entity Registrant Name BUILDERS FIRSTSOURCE, INC.
Entity File Number 0-51357
Entity Incorporation State Country Code DE
Entity Tax Identification Number 52-2084569
Entity Address, Address Line One 2001 Bryan Street
Entity Address, Address Line Two Suite 1600
Entity Address, City or Town Dallas
Entity Address, State or Province TX
Entity Address, Postal Zip Code 75201
City Area Code (214)
Local Phone Number 880-3500
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, par value $0.01 per share
Trading Symbol BLDR
Security Exchange Name NASDAQ
Entity Emerging Growth Company false