| Standard label: | Allowance for Loan and Lease Losses, Real Estate |
| Name: | us-gaap:AllowanceForLoanAndLeaseLossesRealEstate |
| Documentation: | The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AllowanceForLoanAndLeaseLossesRealEstate |
| Label | Role | Language |
| Allowance for Loan and Lease Losses, Real Estate | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 310 45 4 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |