| Standard label: | Schedule of Assets Sold under Agreements to Repurchase [Table] |
| Name: | us-gaap:ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable |
| Documentation: | Schedule, as of the most recent balance sheet date, of securities or other assets sold under repurchase agreements when this amount exceeds 10 percent of total assets. Disclosure may include the following: the type of securities or assets sold under agreements to repurchase, the carrying amount, market value (including accrued interest plus any cash or other assets on deposit. The information is segregated into securities maturing (1) overnight; (2) term up to 30 days; (3) term of 30 to 90 days; (4) term over 90 days; (5) demand. |
| Object type: | cm:Table |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable |
| Label | Role | Language |
| Schedule of Assets Sold under Agreements to Repurchase [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 235 10 S99 1 (SX 210.4-08.(m)(1)(i)(A)) | http://fasb.org/us-gaap/role/ref/legacyRef | 235 |