| Standard label: | Preferred Units, Preferred Partners' Capital Accounts |
| Name: | us-gaap:PreferredUnitsPreferredPartnersCapitalAccounts |
| Documentation: | The amount of the preferred partners' ownership interests. |
| 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:PreferredUnitsPreferredPartnersCapitalAccounts |
| Label | Role | Language |
| Preferred Units, Preferred Partners' Capital Accounts | http://www.xbrl.org/2003/role/label | en-US |
| Preferred Units, Preferred Partners' Capital Accounts, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 272 10 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 272 |
| FASB Accounting Standards Codification 505 10 S99 5 (SAB Topic 4.F) | http://fasb.org/us-gaap/role/ref/legacyRef | 505 |