| Standard label: | Undistributed Earnings (Loss) Available to Common Shareholders, Diluted |
| Name: | us-gaap:UndistributedEarningsLossAvailableToCommonShareholdersDiluted |
| Documentation: | Amount of undistributed earnings (loss), allocated to common stock, as if earnings and addition from assumption of issuance of common shares for dilutive potential common shares, had been distributed. Excludes distributed earnings. |
| 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:UndistributedEarningsLossAvailableToCommonShareholdersDiluted |
| Label | Role | Language |
| Undistributed Earnings (Loss) Available to Common Shareholders, Diluted | http://www.xbrl.org/2003/role/label | en-US |
| Undistributed Earnings (Loss) Available to Common Shareholders, Diluted, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 260 10 45 60B (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 45 16 | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 45 65 | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 45 66 | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |