| Standard label: | Financing Receivable, Covered, Allowance for Credit Loss |
| Name: | us-gaap:FinancingReceivableCoveredAllowanceForCreditLoss |
| Documentation: | Amount of allowance for finance receivable covered by loss sharing agreement. |
| 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:FinancingReceivableCoveredAllowanceForCreditLoss |
| Label | Role | Language |
| Financing Receivable, Covered, Allowance for Credit Loss | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 310 10 50 4 | http://www.xbrl.org/2009/role/commonPracticeRef | 310 |
| FASB Accounting Standards Codification 326 20 45 1 | http://www.xbrl.org/2009/role/commonPracticeRef | 326 |
| FASB Accounting Standards Codification 326 20 50 13 (a) | http://www.xbrl.org/2009/role/commonPracticeRef | 326 |
| FASB Accounting Standards Codification 326 20 50 13 (f) | http://www.xbrl.org/2009/role/commonPracticeRef | 326 |