| Standard label: | Allowance for Loan and Lease Loss, Recovery of Bad Debts |
| Name: | us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts |
| Documentation: | Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. |
| 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:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts |
| Label | Role | Language |
| Allowance for Loan and Lease Loss, Recovery of Bad Debts | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 310 10 50 11B (c)(4) | http://fasb.org/us-gaap/role/ref/legacyRef | 310 |
| Part Of Roll Up: |
| us-gaap:AllowanceForLoanAndLeaseLossesWriteoffsNet |