cm:Concept: us-gaap:InventoryOperativeBuilders
| Inventory, Operative Builders |
| us-gaap:InventoryOperativeBuilders |
| The net carrying amount as of the balance sheet date of the sum of the various components of an operative builder's inventory, including finished homes. Operative builders primarily consist of entities that develop land, construct residential homes and commercial and industrial buildings thereon, and sell them to home buyers and operators of the commercial and industrial properties. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:InventoryOperativeBuilders |