| Standard label: | Unamortized Discounts on Acceptances Executed |
| Name: | us-gaap:UnamortizedDiscountsOnAcceptancesExecuted |
| Documentation: | The amount of the unearned (fee) income on the financial institution's issuance of short-term negotiable time drafts (also known as Banker's Acceptances). |
| 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:UnamortizedDiscountsOnAcceptancesExecuted |
| Label | Role | Language |
| Unamortized Discounts on Acceptances Executed | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 310 20 50 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 310 |
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03.14) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |