| Standard label: | Additional Paid in Capital, Common Stock |
| Name: | us-gaap:AdditionalPaidInCapitalCommonStock |
| Documentation: | Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AdditionalPaidInCapitalCommonStock |
| Label | Role | Language |
| Additional Paid in Capital, Common Stock | http://www.xbrl.org/2003/role/label | en-US |
| Additional Paid in Capital, Common Stock, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Additional Paid in Capital, Common Stock, Beginning Balance | http://www.xbrl.org/2003/role/periodStartLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02(30)(a)(1)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| Part Of Roll Up: |
| us-gaap:AdditionalPaidInCapital |