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Related Party Transactions - Summary of Accounts Receivable from Related Parties (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Accounts receivable from related parties	$ 24,865	$ 20,596
WisdomTree Trust [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	16,057	19,433
ETFS Issuers [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	7,684
Boost Issuer PLC And WisdomTree Issuer plc [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	861	979
WisdomTree Asset Management Canada, Inc [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	163	87
WisdomTree Commodity Services LLC [Member]
Related Party Transaction [Line Items]
Accounts receivable from related parties	$ 100	$ 97

X

- Definition

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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