| Standard label: | Workers' Compensation Discount, Description |
| Name: | us-gaap:WorkersCompensationDiscountDescription |
| Documentation: | Description of the percent discount applied to worker's compensation reserve liability to reduce the reserve to present value. |
| 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:WorkersCompensationDiscountDescription |
| Label | Role | Language |
| Workers' Compensation Discount, Description | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 20 S99 1 (SAB Topic 5.N.Q1) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03(a)(13)(b)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |