| Standard label: | Deferred Profit Sharing [Member] |
| Name: | us-gaap:DeferredProfitSharingMember |
| Documentation: | An arrangement whereby an employee is entitled to receive in the future, subject to vesting and other restrictions, a share in the profits, as defined in the agreement, of the entity or portion thereof. Employer contributions may be discretionary or may be based on a fixed formula related to profits, compensation, or other factors. It is a form of incentive compensation to employees in addition to their regular salary and bonuses. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DeferredProfitSharingMember |
| Label | Role | Language |
| Deferred Profit Sharing [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |