| Standard label: | Cash Flows Between Transferor and Transferee, Servicing Fee Advances |
| Name: | us-gaap:CashFlowsBetweenTransfereeAndTransferorServicingFeeAdvances |
| Documentation: | Cash flows between transferor and transferee in payment of service fees in advance, prior to or in contemplation of a securitization, asset-backed financing arrangement, or similar transfer in which the transferor will have continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:CashFlowsBetweenTransfereeAndTransferorServicingFeeAdvances |
| Label | Role | Language |
| Cash Flows Between Transferor and Transferee, Servicing Fee Advances | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 860 20 50 3 (d)(4) | http://www.xbrl.org/2009/role/commonPracticeRef | 860 |