| Standard label: | Buildings and Improvements, Gross |
| Name: | us-gaap:BuildingsAndImprovementsGross |
| Documentation: | Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing. |
| 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:BuildingsAndImprovementsGross |
| Label | Role | Language |
| Buildings and Improvements, Gross | http://www.xbrl.org/2003/role/label | en-US |
| Buildings and Improvements, Gross, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 45 4 (f) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 360 10 50 1 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 360 |
| Part Of Roll Up: |
| us-gaap:PropertyPlantAndEquipmentGross |