| Standard label: | Investments in and Advances to Affiliates, at Fair Value, Gross Additions |
| Name: | us-gaap:InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions |
| Documentation: | Gross additions to the investment in and advance to the affiliate. |
| 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:InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions |
| Label | Role | Language |
| Investments in and Advances to Affiliates, at Fair Value, Gross Additions | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 946 320 S99 6 (SX 210.12-14.1(b)(3)) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |