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Exit Activities - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Acquisition and disposition-related costs $ 0 $ 416 $ 902
WisdomTree Asset Management Canada, Inc [Member]      
Acquisition and disposition-related costs   $ 416 $ 902