| Standard label: | Shares held in Employee Stock Option Plan, Suspense Shares |
| Name: | us-gaap:SharesHeldInEmployeeStockOptionPlanSuspenseShares |
| Documentation: | Number of suspense shares held by the Employee Stock Option Plan at balance sheet date. Suspense shares are shares that have not been released, committed to be released or allocated to individual participant accounts. |
| Object type: | cm:Concept |
| Data type: | Shares (xbrli:sharesItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:SharesHeldInEmployeeStockOptionPlanSuspenseShares |
| Label | Role | Language |
| Shares held in Employee Stock Option Plan, Suspense Shares | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 718 40 50 1 (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 718 |