| Standard label: | Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block] |
| Name: | us-gaap:FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock |
| Documentation: | Tabular disclosure of information about fair value of asset and liability not measured at fair value. |
| 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:FairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTableTextBlock |
| Label | Role | Language |
| Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 820 10 50 2E | http://www.xbrl.org/2003/role/disclosureRef | 820 |