| Standard label: | Other Investment Not Readily Marketable [Table] |
| Name: | us-gaap:OtherInvestmentNotReadilyMarketableTable |
| Documentation: | Description of the information about other investments not readily marketable, including, but not limited to, description of investment, fair value and value as measured by quoted price. |
| Object type: | cm:Table |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:OtherInvestmentNotReadilyMarketableTable |
| Label | Role | Language |
| Other Investment Not Readily Marketable [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 940 820 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 940 |