| Standard label: | Securities Loaned, Fair Value of Collateral |
| Name: | us-gaap:SecuritiesLoanedFairValueOfCollateral |
| Documentation: | Fair value of the securities pledged as collateral against securities loaned. |
| 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:SecuritiesLoanedFairValueOfCollateral |
| Label | Role | Language |
| Securities Loaned, Fair Value of Collateral | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 20 55 12 | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |