| Standard label: | Contract Cost, Unapproved Change Order, Amount |
| Name: | us-gaap:UnapprovedChangeOrdersAmount |
| Documentation: | Amount of cost incurred on construction contract for unapproved change order, claim, or similar item subject to uncertainty. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:UnapprovedChangeOrdersAmount |
| Label | Role | Language |
| Contract Cost, Unapproved Change Order, Amount | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 910 20 50 1 (a) | http://www.xbrl.org/2003/role/disclosureRef | 910 |