cm:Member: us-gaap:LeasesAcquiredInPlaceMember
| Leases, Acquired-in-Place [Member] |
| us-gaap:LeasesAcquiredInPlaceMember |
| This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:LeasesAcquiredInPlaceMember |