| Standard label: | Basis of Accounting, Policy [Policy Text Block] |
| Name: | us-gaap:BasisOfAccountingPolicyPolicyTextBlock |
| Documentation: | Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). |
| Object type: | cm:Level2TextBlock |
| 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:BasisOfAccountingPolicyPolicyTextBlock |
| Label | Role | Language |
| Basis of Accounting, Policy [Policy Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |