Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 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 September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Revenue from contracts with customers:
Commissions	$	409,082	$	351,969	$	1,259,571	$	1,138,313
Data, software, and post-trade		18,364		16,547		55,015		47,016
Fees from related parties		8,208		6,821		21,224		19,054
Other revenues		3,637		30		8,728		30
Total revenue from contracts with customers		439,291		375,367		1,344,538		1,204,413
Other sources of revenue:
Principal transactions		75,536		73,360		250,198		250,266
Interest income		3,976		2,870		15,454		10,485
Other revenues		2,334		4,045		6,885		6,295
Total revenues	$	521,137	$	455,642	$	1,617,075	$	1,471,459