| Standard label: | Earnings Per Share, Basic, Undistributed |
| Name: | us-gaap:EarningsPerShareBasicUndistributed |
| Documentation: | The earnings attributable to each security on the basis that all of the earnings for the period had been distributed (to the extent that each security may share in earnings). This is the earnings amount which reflects the participation rights in undistributed earnings of each security. |
| Object type: | cm:Concept |
| Data type: | Share (num:perShareItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:EarningsPerShareBasicUndistributed |
| Label | Role | Language |
| Earnings Per Share, Basic, Undistributed | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 260 10 45 60A | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 45 60B | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 45 60 | 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 |