| Standard label: | Adjustable Rate Residential Mortgage [Member] |
| Name: | us-gaap:AdjustableRateResidentialMortgageMember |
| Documentation: | Loan to purchase or refinance residential real estate (for example, but not limited to, a home) in which the interest rate is periodically adjusted according to changes in a specified reference rate. |
| 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:AdjustableRateResidentialMortgageMember |
| Label | Role | Language |
| Adjustable Rate Residential Mortgage [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/2009/role/commonPracticeRef | 948 |