| Standard label: | SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Write-down or Reserve, Amount |
| Name: | us-gaap:MortgageLoansOnRealEstateWritedownOrReserveAmount1 |
| Documentation: | Amount of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, written down. |
| 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:MortgageLoansOnRealEstateWritedownOrReserveAmount1 |
| Label | Role | Language |
| SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Write-down or Reserve, Amount | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 948 310 S99 1 (SX 210.12-29(Footnote 7)) | http://www.xbrl.org/2003/role/disclosureRef | 948 |