Related Party Transactions - Summary of Accounts Receivable from Related Parties (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Accounts receivable from related parties	$ 21,222	$ 25,628
WisdomTree Trust [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	14,618	15,987
Manjer Issuers [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	4,624	6,460
WisdomTree Multi Asset Issuer PLC And WisdomTree Issuer PLC [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	$ 1,980	$ 3,181