Receivables from/Payables to Broker-Dealers and Clearing Organizations (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets
Due from prime brokers	$ 208,639	$ 560,111
Deposits with clearing organizations	182,008	146,927
Net equity with futures commission merchants	166,808	137,312
Unsettled trades with clearing organizations	1,096	87,145
Securities failed to deliver	148,822	149,747
Commissions and fees	30,351	33,943
Total receivables from broker-dealers and clearing organizations	737,724	1,115,185
Liabilities
Due to prime brokers	780,310	229,424
Net equity with futures commission merchants	(36,059)	(32,381)
Unsettled trades with clearing organizations	313,875	38
Securities failed to receive	104,702	70,576
Commissions and fees	4,884	6,186
Total payables to broker-dealers and clearing organizations	1,167,712	273,843
Outstanding principal balance	$ 175,300	$ 212,900