| Standard label: | Qualitative and Quantitative Information, Transferor's Continuing Involvement, Reasons | 
| Name: | us-gaap:QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementReasons | 
| Documentation: | Describes the transferor's reasons for transferring the financial assets and for continuing to have an on-going involvement with the financial assets transferred. | 
| Object type: | cm:Concept | 
| Data type: | Text/String (xbrli:stringItemType) | 
| Period type: | For Period (duration) | 
| Balance type: | (no balance type) | 
| Abstract: | false | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementReasons | 
| Label | Role | Language | 
| Qualitative and Quantitative Information, Transferor's Continuing Involvement, Reasons | 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 |