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Related Party Transactions (Tables) | 6 Months Ended
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Jun. 30, 2018
Related Party Transactions [Abstract] |
Summary of Accounts Receivable from Related Parties | The following table summarizes accounts receivable from related parties which are included as a component of Accounts receivable on the Company’s Consolidated Balance Sheets:
|  | June 30, 2018 |  |  | December 31, 2017 |
Receivable from WTT |  | $ | 17,035 |  |  | $ | 19,433 |
Receivable from ETFS Issuers |  |  | 8,369 |  |  |  | — |
Receivable from BI and WTI |  |  | 957 |  |  |  | 979 |
Receivable from WTCS |  |  | 110 |  |  |  | 97 |
Receivable from WTAMC |  |  | 137 |  |  |  | 87 |
Total |  | $ | 26,608 |  |  | $ | 20,596 |
Summary of Revenues from Advisory Services Provided to Related Parties | The following table summarizes revenues from advisory services provided to related parties:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Advisory services provided to WTT |  | $ | 52,591 |  |  | $ | 53,311 |  |  | $ | 107,792 |  |  | $ | 103,767 |
Advisory services provided to ETFS Issuers |  |  | 17,720 |  |  |  | — |  |  |  | 17,720 |  |  |  | — |
Advisory services provided to BI and WTI |  |  | 2,724 |  |  |  | 2,125 |  |  |  | 5,351 |  |  |  | 4,046 |
Advisory services provided to WTCS |  |  | 340 |  |  |  | 330 |  |  |  | 656 |  |  |  | 900 |
Advisory services provided to WTAMC |  |  | 403 |  |  |  | 90 |  |  |  | 715 |  |  |  | 171 |
Total |  | $ | 73,778 |  |  | $ | 55,856 |  |  | $ | 132,234 |  |  | $ | 108,884 |

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- References No definition available. + Details
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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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- Definition Schedule Of Accounts Receivable From Related Party [Table Text Block] + References No definition available. + Details
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