| Standard label: | Preferred Stock, No Par Value |
| Name: | us-gaap:PreferredStockNoParValue |
| Documentation: | Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer. |
| Object type: | cm:Concept |
| Data type: | Share (num:perShareItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PreferredStockNoParValue |
| Label | Role | Language |
| Preferred Stock, No Par Value | http://www.xbrl.org/2003/role/label | 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 |