Quarterly report pursuant to Section 13 or 15(d)

Net Capital Requirements of Broker-Dealer Subsidiaries - Additional Information (Detail)

v3.10.0.1
Net Capital Requirements of Broker-Dealer Subsidiaries - Additional Information (Detail) - National Securities [Member]
$ in Millions
Sep. 30, 2018
USD ($)
Net Capital $ 11.3
Excess Net Capital at 1000 Percent 10.3
Minimum Net Capital Required for Broker-Dealer Subsidiary $ 1.0