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Document and Entity Information
Sep. 09, 2021
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0000880631
Document Type 8-K
Document Period End Date Sep. 09, 2021
Entity Registrant Name WisdomTree Investments, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-10932
Entity Tax Identification Number 13-3487784
Entity Address, Address Line One 230 Park Avenue
Entity Address, Address Line Two 3/4 Floor West
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10169
City Area Code (212)
Local Phone Number 801-2080
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.01 par value
Trading Symbol WETF
Security Exchange Name NASDAQ
Entity Emerging Growth Company false