| Standard label: | Use Rights [Member] |
| Name: | us-gaap:UseRightsMember |
| Documentation: | Legal right to use or benefit from the use of natural resources or access. Examples include, but are not limited to, drilling rights, water rights, air rights, timber cutting rights and route authorities. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:UseRightsMember |
| Label | Role | Language |
| Use Rights [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 805 20 55 31 (i) | http://fasb.org/us-gaap/role/ref/legacyRef | 805 |