| Standard label: | Net Income (Loss) Available to Common Stockholders, Basic |
| Name: | us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic |
| Documentation: | Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic |
| Label | Role | Language |
| Net Income (Loss) Available to Common Stockholders, Basic | http://www.xbrl.org/2003/role/label | en-US |
| Net Income (Loss) Available to Common Stockholders, Basic, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 250 10 50 11 | http://www.xbrl.org/2003/role/disclosureRef | 250 |
| FASB Accounting Standards Codification 260 10 45 11 | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| Part Of Roll Up: |
| us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted |