| Standard label: | Banker's Acceptance Disclosures [Table Text Block] |
| Name: | us-gaap:BankersAcceptance |
| Documentation: | Tabular disclosure of short-term negotiable time drafts drawn on and accepted by an institution (also known as banker's acceptances), outstanding and any related unamortized discounts or fee income required to be and included in the financial statement disclosures. |
| Object type: | cm:Level3TextBlock |
| Data type: | Text Block (HTML) (nonnum:textBlockItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:BankersAcceptance |
| Label | Role | Language |
| Banker's Acceptance Disclosures [Table Text Block] | 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 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 |