Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 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:

	December 31,
	2018		2017
Receivable from WTT	$	14,678	$	19,433
Receivable from ETFS Issuers		8,779		—
Receivable from BI and WTI		951		979
Receivable from WTAMC		167		87
Receivable from WTCS		95		97
Total	$	24,670	$	20,596

Summary of Revenues from Advisory Services Provided to Related Parties

The following table summarizes revenues from advisory services provided to related parties:

	Year Ended December 31,
	2018		2017		2016
Advisory services provided to WTT	$	203,031	$	215,513	$	209,199
Advisory services provided to ETFS Issuers		54,601		—		—
Advisory services provided to BI and WTI		10,448		9,205		7,003
Advisory services provided to WTAMC		1,757		466		148
Advisory services provided to WTCS		1,267		1,508		1,867
Total	$	271,104	$	226,692	$	218,217