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Document and Entity Information
Jul. 14, 2023
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001494259
Document Type 8-K
Document Period End Date Jul. 14, 2023
Entity Registrant Name CarGurus, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-38233
Entity Tax Identification Number 04-3843478
Entity Address, Address Line One 2 Canal Park
Entity Address, Address Line Two 4thFloor
Entity Address, City or Town Cambridge
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02141
City Area Code (617)
Local Phone Number 354-0068
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Class A Common Stock, par value $0.001 per share
Trading Symbol CARG
Security Exchange Name NASDAQ
Entity Emerging Growth Company false