cm:Concept: us-gaap:SaleLeasebackTransactionQuarterlyRentalPayments
| Sale Leaseback Transaction, Quarterly Rental Payments |
| us-gaap:SaleLeasebackTransactionQuarterlyRentalPayments |
| The amount of the quarterly rental payments due under the lease entered into in connection with the transactions involving the sale of property to another party and the lease of the property back to the seller. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:SaleLeasebackTransactionQuarterlyRentalPayments |