cm:Concept: us-gaap:LineOfCreditFacilityRevolvingCreditConversionToTermLoanDescription
| Line of Credit Facility, Revolving Credit Conversion to Term Loan, Description |
| us-gaap:LineOfCreditFacilityRevolvingCreditConversionToTermLoanDescription |
| Describes when borrowings outstanding under a line of credit will convert to a term loan, and describes the repayment terms, collateral, and priority (seniority) of the term loan. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:LineOfCreditFacilityRevolvingCreditConversionToTermLoanDescription |