| Standard label: | Assets Sold under Agreements to Repurchase, Type [Domain] |
| Name: | us-gaap:AssetsSoldUnderAgreementsToRepurchaseTypeDomain |
| Documentation: | This is the type of such assets (for example, US Treasury Obligations, US Government agency obligations and loans, and so forth). This item may be presented as an element in the table that is disclosed when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceed 10 percent of total assets, as of the most recent balance sheet date. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AssetsSoldUnderAgreementsToRepurchaseTypeDomain |
| Label | Role | Language |
| Assets Sold under Agreements to Repurchase, Type [Domain] | 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 |