| Standard label: | Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned |
| Name: | us-gaap:CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoaned |
| Documentation: | Carrying value of federal funds purchased and securities sold under repurchase agreements and deposits received for securities loaned. |
| 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:CarryingValueOfFederalFundsPurchasedSecuritiesSoldUnderAgreementsToRepurchaseAndDepositsReceivedForSecuritiesLoaned |
| Label | Role | Language |
| Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned | http://www.xbrl.org/2003/role/label | en-US |
| Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 235 10 S99 1 (SX 210.4-08.(m)(1)) | http://fasb.org/us-gaap/role/ref/legacyRef | 235 |
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03.13(1)) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |