Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers - Schedule of Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Receivables from broker-dealers, clearing organizations and customers:
Securities failed-to-deliver - broker-dealers and clearing organizations	$ 144,523	$ 152,766
Securities failed-to-deliver - customers	235,056	182,052
Deposits with clearing organizations and broker-dealers	88,923	68,565
Other	7,833	4,963
Total	476,335	408,346
Payables to broker-dealers, clearing organizations and customers:
Securities failed-to-receive - broker-dealers and clearing organizations	224,816	166,010
Securities failed-to-receive - customers	71,828	59,879
Other	7,349	3,436
Total	$ 303,993	$ 229,325