| Standard label: | Concentration Risk, Net Assets Amount, Geographic Area |
| Name: | us-gaap:ConcentrationRiskNetAssetsAmountGeographicArea |
| Documentation: | Carrying amount of total assets less total liabilities of a designated geographic area if disclosed as a concentration risk. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ConcentrationRiskNetAssetsAmountGeographicArea |
| Label | Role | Language |
| Concentration Risk, Net Assets Amount, Geographic Area | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 275 10 50 20 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 275 |