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Related Party Transactions - Summary of Accounts Receivable from Related Parties (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Related Party Transaction [Line Items] |  |
Accounts receivable from related parties | $ 17,349 | $ 25,047
WisdomTree Trust [Member] |  |
Related Party Transaction [Line Items] |  |
Accounts receivable from related parties | 16,506 | 24,560
Boost Issuer PLC And WisdomTree Issuer plc [Member] |  |
Related Party Transaction [Line Items] |  |
Accounts receivable from related parties | 645 | $ 487
WisdomTree Commodity Services LLC [Member] |  |
Related Party Transaction [Line Items] |  |
Accounts receivable from related parties | 158 |
WisdomTree Asset Management Canada, Inc [Member] |  |
Related Party Transaction [Line Items] |  |
Accounts receivable from related parties | $ 40 |

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