| Standard label: | Advances from Federal Home Loan Banks |
| Name: | us-gaap:AdvancesFromFederalHomeLoanBanks |
| Documentation: | Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. |
| 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:AdvancesFromFederalHomeLoanBanks |
| Label | Role | Language |
| Advances from Federal Home Loan Banks | http://www.xbrl.org/2003/role/label | en-US |
| Advances from Federal Home Loan Banks, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 942 470 45 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |