cm:Concept: us-gaap:OperatingLeasesIncomeStatementInitialDirectCosts
| Operating Leases, Income Statement, Initial Direct Costs |
| us-gaap:OperatingLeasesIncomeStatementInitialDirectCosts |
| Costs that are essential to acquiring the lease and would not otherwise have been incurred without the lease agreement, including evaluating the lessee's credit condition, guarantees, and collateral and costs incurred negotiating, processing, and closing the lease agreement. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:OperatingLeasesIncomeStatementInitialDirectCosts |