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Related Party Transactions - Summary of Revenues from Advisory Services Provided to Related Parties (Detail) - Advisory Services [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Related Party Transaction [Line Items]    
Revenues from advisory services $ 77,637 $ 76,517
WisdomTree Trust [Member]    
Related Party Transaction [Line Items]    
Revenues from advisory services 49,487 46,070
Manjer Issuers [Member]    
Related Party Transaction [Line Items]    
Revenues from advisory services 24,840 26,905
WisdomTree Multi Asset Issuer PLC And WisdomTree Issuer PLC [Member]    
Related Party Transaction [Line Items]    
Revenues from advisory services $ 3,310 $ 3,542