| Standard label: | Participating Mortgage Loans, Unamortized Debt Discount, Amount |
| Name: | us-gaap:ParticipatingMortgageLoansUnamortizedDebtDiscountAmount |
| Documentation: | The amount of the related debt discount at the end of the accounting period. |
| 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:ParticipatingMortgageLoansUnamortizedDebtDiscountAmount |
| Label | Role | Language |
| Participating Mortgage Loans, Unamortized Debt Discount, Amount | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 470 30 50 1 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 470 |