| Standard label: | Demutualization by Insurance Entity, Securities Issued, Offering Costs |
| Name: | us-gaap:DemutualizationByInsuranceEntitySecuritiesIssuedOfferingCosts |
| Documentation: | Cost of offering shares or units in an insurance entity stock offering in connection with its conversion from a mutual form of ownership to a stock entity. |
| 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:DemutualizationByInsuranceEntitySecuritiesIssuedOfferingCosts |
| Label | Role | Language |
| Demutualization by Insurance Entity, Securities Issued, Offering Costs | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 805 45 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |