| Standard label: | Deferred Lease Income, before Accumulated Amortization |
| Name: | us-gaap:DeferredRevenueLeasesGross |
| Documentation: | Amount, before accumulated amortization, of deferred lease income. Includes, but is not limited to, amount paid in advance by lessee. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DeferredRevenueLeasesGross |
| Label | Role | Language |
| Deferred Lease Income, before Accumulated Amortization | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 840 30 50 4 (a)(4) | http://fasb.org/us-gaap/role/ref/legacyRef | 840 |