Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2019

Revenue From Contract With Customer [Abstract]

Summary of Revenues from Contracts with Customers and Other Sources of Revenues

The following table presents the Company’s total revenues separated between revenues from contracts with customers and other sources of revenues (in thousands):

	Three Months Ended March 31, 2019		Three Months Ended March 31, 2018
Revenue from contracts with customers:
Commissions	$	429,520	$	407,857
Data, software, and post-trade		17,910		15,099
Fees from related parties		5,795		6,299
Other revenues		2,775		—
Total revenue from contracts with customers		456,000		429,255
Other sources of revenue:
Principal transactions		84,230		91,918
Interest income		3,665		2,675
Other revenues		856		926
Total revenues	$	544,751	$	524,774