| Standard label: | Financing Receivable, Credit Loss, Expense (Reversal) |
| Name: | us-gaap:ProvisionForLoanLossesExpensed |
| Documentation: | Amount of credit loss expense (reversal of expense) for financing receivable. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ProvisionForLoanLossesExpensed |
| Label | Role | Language |
| Financing Receivable, Credit Loss, Expense (Reversal) | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 326 20 50 13 (b) | http://www.xbrl.org/2003/role/disclosureRef | 326 |
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03(7)(d)) | http://www.xbrl.org/2003/role/disclosureRef | 942 |
| FASB Accounting Standards Codification 942 220 S99 1 (SX 210.9-04(11)) | http://www.xbrl.org/2003/role/disclosureRef | 942 |
| Part Of Roll Up: |
| us-gaap:ProvisionForLoanAndLeaseLosses |