| Standard label: | Deferred Employee Stock Ownership Plan, Issuance of Shares or Sale of Treasury Shares |
| Name: | us-gaap:TreasuryStockDeferredEmployeeStockOwnershipPlan |
| Documentation: | The issuance of shares or sale of treasury shares to an Employee Stock Ownership Plan (ESOP). |
| 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:TreasuryStockDeferredEmployeeStockOwnershipPlan |
| Label | Role | Language |
| Deferred Employee Stock Ownership Plan, Issuance of Shares or Sale of Treasury Shares | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 718 40 45 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 718 |
| Part Of Roll Up: |
| us-gaap:StockholdersEquity |