cm:Concept: us-gaap:LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms
| Line of Credit Facility, Frequency of Payment and Payment Terms |
| us-gaap:LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms |
| Description of the frequency of the required periodic payments of interest, principal, or both, and the amount, if set, or a description of a formula upon which payment is based. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms |