| Standard label: | Receivables from Brokers-Dealers and Clearing Organizations |
| Name: | us-gaap:ReceivablesFromBrokersDealersAndClearingOrganizations |
| Documentation: | Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ReceivablesFromBrokersDealersAndClearingOrganizations |
| Label | Role | Language |
| Receivables from Brokers-Dealers and Clearing Organizations | http://www.xbrl.org/2003/role/label | en-US |
| Receivables from Brokers-Dealers and Clearing Organizations, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 310 10 45 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 310 |
| FASB Accounting Standards Codification 940 20 45 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 940 |