| Standard label: | Income Tax Expense (Benefit), Intraperiod Tax Allocation |
| Name: | us-gaap:IncomeTaxExpenseBenefitIntraperiodTaxAllocation |
| Documentation: | Amount of income tax expense (benefit) for continuing operations, discontinued operations, other comprehensive income, and items charged (credited) directly to shareholders' equity. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:IncomeTaxExpenseBenefitIntraperiodTaxAllocation |
| Label | Role | Language |
| Income Tax Expense (Benefit), Intraperiod Tax Allocation | http://www.xbrl.org/2003/role/label | en-US |
| Income Tax Expense (Benefit), Intraperiod Tax Allocation, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 740 20 45 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |