| Standard label: | Income Tax Disclosure [Text Block] |
| Name: | us-gaap:IncomeTaxDisclosureTextBlock |
| Documentation: | The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. |
| 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:IncomeTaxDisclosureTextBlock |
| Examples of this text block disclosure: | IncomeTaxDisclosure |
| Label | Role | Language |
| Income Tax Disclosure [Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 740 | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |