| Standard label: | Conventional Mortgage Loan [Member] |
| Name: | us-gaap:ConventionalLoanMember |
| Documentation: | Mortgage loan issued by a bank, which is typically in an amount between 70 to 80 percent of the purchase price of the property securing the loan, has a repayment period of 15 to 30 years, and requires that certain credit criteria be met. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ConventionalLoanMember |
| Label | Role | Language |
| Conventional Mortgage Loan [Member] | 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 3)) | http://www.xbrl.org/2003/role/exampleRef | 948 |