Contingent Payments - Additional Information (Detail) $ in Thousands, $ in Thousands			3 Months Ended
	Feb. 19, 2020 USD ($)	Feb. 19, 2020 CAD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	May 04, 2020 USD ($)	Feb. 19, 2020 CAD ($)
WisdomTree Asset Management Canada, Inc [Member]
Proceeds from divestiture of businesses	$ 2,774	$ 3,720
Additional consideration payable	2,360						$ 3,000
WisdomTree Asset Management Canada, Inc [Member] | Maximum [Member]
Additional consideration payable	$ 4,000
WisdomTree Asset Management Canada, Inc [Member] | Minimum [Member]
Additional consideration payable							$ 0
Advisor Engine [Member]
Maximum amount of contingent payments that may be received						$ 10,408
Contingent payments			$ 0		$ 0
Contingent payments received			$ 0	$ 0
Advisor Engine [Member] | Fair Value Of Upfront Consideration Received [Member]
Fair value of upfront consideration received						$ 9,592