| Standard label: | Fee Income on Acceptances Executed |
| Name: | us-gaap:FeeIncomeOnAcceptancesExecuted |
| Documentation: | Amount of amortization to income from discounts on short-term negotiable time drafts drawn on and accepted by an institution (also known as Banker's Acceptances). |
| 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:FeeIncomeOnAcceptancesExecuted |
| Label | Role | Language |
| Fee Income on Acceptances Executed | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 310 20 45 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 310 |
| FASB Accounting Standards Codification 942 220 S99 1 (SX 210.9-04(1)) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |