| Standard label: | Preferred Stock [Member] |
| Name: | us-gaap:PreferredStockMember |
| Documentation: | Preferred shares may provide a preferential dividend to the dividend on common stock and may take precedence over common stock in the event of a liquidation. Preferred shares typically represent an ownership interest in the company. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PreferredStockMember |
| Label | Role | Language |
| Preferred Stock [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |