| Standard label: | Preferred Stock, Shares Outstanding |
| Name: | us-gaap:PreferredStockSharesOutstanding |
| Documentation: | Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. |
| Object type: | cm:Concept |
| Data type: | Shares (xbrli:sharesItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PreferredStockSharesOutstanding |
| Label | Role | Language |
| Preferred Stock, Shares Outstanding | http://www.xbrl.org/2003/role/label | en-US |
| Preferred Stock, Shares Outstanding, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Preferred Stock, Shares Outstanding, 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(28)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |