cm:Member: us-gaap:AccountingStandardsUpdate201507Member
| Accounting Standards Update 2015-07 [Member] |
| us-gaap:AccountingStandardsUpdate201507Member |
| Accounting Standards Update 2015-07 Fair Value Measurement (Topic 820): Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent) (a consensus of the FASB Emerging Issues Task Force). |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:AccountingStandardsUpdate201507Member |