| Standard label: | Additional Paid in Capital, Preferred Stock |
| Name: | us-gaap:AdditionalPaidInCapitalPreferredStock |
| Documentation: | Value received from shareholder in nonredeemable preferred stock-related transaction in excess of par value, value contributed to entity and value received from other stock-related transaction. Includes, but is not limited to, preferred stock redeemable solely at option of issuer. Excludes common stock. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AdditionalPaidInCapitalPreferredStock |
| Label | Role | Language |
| Additional Paid in Capital, Preferred Stock | http://www.xbrl.org/2003/role/label | en-US |
| Additional Paid in Capital, Preferred Stock, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Additional Paid in Capital, Preferred Stock, Beginning Balance | http://www.xbrl.org/2003/role/periodStartLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02(30)(a)(1)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| Part Of Roll Up: |
| us-gaap:AdditionalPaidInCapital |
| us-gaap:PreferredStockIncludingAdditionalPaidInCapital |