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Document and Entity Information
Jun. 17, 2021
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jun. 17, 2021
Entity Registrant Name WisdomTree Investments, Inc.
Entity File Number 001-10932
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 13-3487784
Entity Address, Address Line One 245 Park Avenue
Entity Address, Address Line Two 35th Floor
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10167
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
Title of 12(b) Security Common Stock
Trading Symbol WETF
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0000880631