| Standard label: | Accrued Investment Income Receivable |
| Name: | us-gaap:AccruedInvestmentIncomeReceivable |
| Documentation: | Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments. |
| 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:AccruedInvestmentIncomeReceivable |
| Label | Role | Language |
| Accrued Investment Income Receivable | http://www.xbrl.org/2003/role/label | en-US |
| Accrued Investment Income Receivable, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02(3)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03(10)) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03(a)(4)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |