| Standard label: | Deposit Liabilities, Collateral Issued, Description |
| Name: | us-gaap:DepositLiabilitiesCollateralIssuedDescription |
| Documentation: | Description of deposits held by the entity for which there are securities, mortgage loans, or other financial instruments pledged as collateral for the deposits. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DepositLiabilitiesCollateralIssuedDescription |
| Label | Role | Language |
| Deposit Liabilities, Collateral Issued, Description | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 942 405 50 1 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |