| Standard label: | Property, Plant and Equipment Disclosure [Text Block] |
| Name: | us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock |
| Documentation: | The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. |
| Object type: | cm:Level1TextBlock |
| Data type: | Text Block (HTML) (nonnum:textBlockItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock |
| Examples of this text block disclosure: | PropertyPlantAndEquipmentDisclosure |
| Label | Role | Language |
| Property, Plant and Equipment Disclosure [Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 360 | http://fasb.org/us-gaap/role/ref/legacyRef | 360 |