| Name | FloorBrokerageExchangeAndClearanceFees |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:monetaryItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | debit |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Floor Brokerage, Exchange and Clearance Fees | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Floor Brokerage, Exchange and Clearance Fees, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The amount of expense during the period for floor brokerage fees paid to other broker-dealers to execute trades on their behalf, stock exchange fees, order flow fees, and clearance fees. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:FloorBrokerage | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfIncome | |
us-gaap:ExchangeFees | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfIncome | |
us-gaap:OrderFlowFees | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfIncome | |
us-gaap:ClearanceFees | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfIncome |