| Standard label: | Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted | 
| Name: | us-gaap:NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | 
| Documentation: | Per unit of ownership amount after tax of income (loss) available to limited partnership (LP) unit-holder and units that would have been outstanding assuming the issuance of limited partner units for dilutive potential units outstanding. | 
| Object type: | cm:Concept | 
| Data type: | Share (num:perShareItemType) | 
| Period type: | For Period (duration) | 
| Balance type: | (no balance type) | 
| Abstract: | false | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | 
| Label | Role | Language | 
| Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted | http://www.xbrl.org/2003/role/label | en-US | 
| Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted, Total | http://www.xbrl.org/2003/role/totalLabel | en-US | 
| Reference | Role | Topic | 
| FASB Accounting Standards Codification 505 10 S99 5 (SAB Topic 4.F) | http://fasb.org/us-gaap/role/ref/legacyRef | 505 |