| Standard label: | Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement |
| Name: | us-gaap:PrincipalAmountOutstandingOnLoansSecuritized |
| Documentation: | This is the principal amount outstanding for securitized loans only (across all types of loans). |
| 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:PrincipalAmountOutstandingOnLoansSecuritized |
| Label | Role | Language |
| Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 860 20 50 4 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 860 |
| Part Of Roll Up: |
| us-gaap:PrincipalAmountOutstandingOfLoansHeldInPortfolio |