| Standard label: | Employee Stock Ownership Plan (ESOP), Deferred Shares, Fair Value |
| Name: | us-gaap:EmployeeStockOwnershipPlanESOPDeferredSharesFairValue |
| Documentation: | Fair value of unearned shares held by the employee stock ownership plan (ESOP). |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:EmployeeStockOwnershipPlanESOPDeferredSharesFairValue |
| Label | Role | Language |
| Employee Stock Ownership Plan (ESOP), Deferred Shares, Fair Value | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 718 40 50 1 (e) | http://fasb.org/us-gaap/role/ref/legacyRef | 718 |