| Standard label: | Schedule of Capital Leased Assets [Table Text Block] |
| Name: | us-gaap:ScheduleOfCapitalLeasedAsssetsTableTextBlock |
| Documentation: | Tabular disclosure of long-lived, depreciable assets that are subject to a lease meeting the criteria for capitalization and are used in the normal conduct of business to produce goods and services. Examples may include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. |
| Object type: | cm:Level3TextBlock |
| 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:ScheduleOfCapitalLeasedAsssetsTableTextBlock |
| Examples of this text block disclosure: | CapitalLeasedAssets |
| Label | Role | Language |
| Schedule of Capital Leased Assets [Table Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 840 30 50 1 (a) | http://fasb.org/us-gaap/role/ref/otherTransitionRef | 840 |