cm:Concept: us-gaap:WeightedAverageLimitedPartnershipUnitsOutstandingDiluted
| Weighted Average Limited Partnership Units Outstanding, Diluted |
| us-gaap:WeightedAverageLimitedPartnershipUnitsOutstandingDiluted |
| Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period. Used in the calculation of diluted net income or loss per limited partnership unit. |
| cm:Concept |
| Shares (xbrli:sharesItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:WeightedAverageLimitedPartnershipUnitsOutstandingDiluted |