| Standard label: | Employee Stock Ownership Plan (ESOP), Method of Measuring Compensation | 
| Name: | us-gaap:EmployeeStockOwnershipPlanESOPMethodOfMeasuringCompensation | 
| Documentation: | Describes the methods used in determining compensation expense to be recognized by the entity pertaining to its ESOP. | 
| Object type: | cm:Concept | 
| Data type: | Text/String (xbrli:stringItemType) | 
| Period type: | For Period (duration) | 
| Balance type: | (no balance type) | 
| Abstract: | false | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:EmployeeStockOwnershipPlanESOPMethodOfMeasuringCompensation | 
| Label | Role | Language | 
| Employee Stock Ownership Plan (ESOP), Method of Measuring Compensation | http://www.xbrl.org/2003/role/label | en-US | 
| Reference | Role | Topic | 
| FASB Accounting Standards Codification 235 10 50 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 235 | 
| FASB Accounting Standards Codification 718 40 50 1 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 718 |