cm:Concept: us-gaap:SaleLeasebackTransactionOtherPaymentsRequired
| Sale Leaseback Transaction, Other Payments Required |
| us-gaap:SaleLeasebackTransactionOtherPaymentsRequired |
| Other amounts the seller-lessee is required to pay under the terms of the transaction involving the sale of property to another party and lease of the property back to the seller, including reimbursements for such items, as utilities, taxes, insurance and common area maintenance. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:SaleLeasebackTransactionOtherPaymentsRequired |