| Standard label: | Demand Deposits [Member] |
| Name: | us-gaap:DemandDepositsMember |
| Documentation: | Accounts that may or may not bear interest and that depositor is entitled to withdraw at anytime without prior notice. Checking and negotiable order of withdrawal (NOW) accounts are the most common forms of demand deposits. |
| 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:DemandDepositsMember |
| Label | Role | Language |
| Demand Deposits [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |