Revenues from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2021

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,
	2021		2020		2021		2020
Revenues from contracts with customers:
Commissions	$	367,016	$	352,027	$	1,192,004	$	1,190,522
Data, software, and post-trade	22,238		21,523		65,826		61,060
Fees from related parties	3,470		8,814		11,500		20,897
Other revenues	3,236		4,077		10,308		11,427
Total revenues from contracts with customers	395,960		386,441		1,279,638		1,283,906
Other sources of revenues:
Principal transactions	73,997		65,182		254,757		277,946
Interest and dividend income	3,042		2,418		17,535		13,115
Other revenues	748		1,001		1,843		2,368
Total revenues	$	473,747	$	455,042	$	1,553,773	$	1,577,335