| Standard label: | Preferred Stock, Call or Exercise Features |
| Name: | us-gaap:PreferredStockCallOrExerciseFeatures |
| Documentation: | Describe call and/or exercise rights, prices and dates of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). |
| 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:PreferredStockCallOrExerciseFeatures |
| Label | Role | Language |
| Preferred Stock, Call or Exercise Features | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 505 10 50 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 505 |
| FASB Accounting Standards Codification 505 10 50 5 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 505 |