| Standard label: | Residential Mortgage [Member] |
| Name: | us-gaap:ResidentialMortgageMember |
| Documentation: | Loan to purchase or refinance residential real estate for example, but not limited to, a home, in which the real estate itself serves as collateral for the loan. |
| 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:ResidentialMortgageMember |
| Label | Role | Language |
| Residential Mortgage [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 326 20 55 79 | http://www.xbrl.org/2003/role/exampleRef | 326 |