Related Parties (Tables)

9 Months Ended

Sep. 30, 2016

Related Party Transactions [Abstract]

Summary of Balances and Transactions with Related Parties or Their Affiliates

As of the date and period indicated below, the Company had the following balances and transactions with its related parties or their affiliates (in thousands):

	For the three months   ended September 30,					For the nine months   ended September 30,
Statements of Operations	2016		2015			2016		2015
Revenues
Commissions and fees	$	8,171	$	4,496		$	23,246	$	10,624
Trading revenues, net	86		1,343			1,190		5,248
Interest, net	119		399			394		756
Total revenues from related parties	$	8,376	$	6,238		$	24,830	$	16,628
Expenses
Execution and clearance fees(1)	$	4,132	$	(4,525	)	$	8,577	$	(13,333	)
Communications and data processing	4,710		1,577			12,327		3,986
Payment for order flow	—		274			5		2,527
Collateralized financing interest	73		99			199		346
Professional fees	—		—			—		5,507
Other expense	71		479			125		1,756
Total expenses incurred with respect to related parties	$	8,986	$	(2,096	)	$	21,233	$	789

⁽¹⁾  Represents net volume based fees paid or received by KCG for taking or providing liquidity to related trading venues.

Statements of Financial Condition	September 30, 2016		December 31, 2015
Assets
Securities borrowed	$	35,421	$	10,573
Receivable from brokers, dealers and clearing organizations	4,601		1,987
Other assets	62,789		67,652
Liabilities
Securities loaned	$	3,127	$	3,844
Payable to brokers, dealers and clearing organizations	61		61
Accrued expenses and other liabilities	4,016		4,159