cm:Concept: us-gaap:ProceedsFromCollectionOfLongtermLoansToRelatedParties
       
          
          | Proceeds from Collection of Long-term Loans to Related Parties | 
       
       
          
          | us-gaap:ProceedsFromCollectionOfLongtermLoansToRelatedParties | 
       
       
          
          | The cash inflow associated with collection, whether partial or full, of long-term loans to a related party. Alternate caption: Proceeds from Advances to Affiliates. | 
       
       
          
          | cm:Concept | 
       
       
          
          | Monetary (xbrli:monetaryItemType) | 
       
       
          
          | For Period (duration) | 
       
       
          
          | Debit | 
       
       
          
          | false | 
       
       
          
          | us-gaap:ProceedsFromCollectionOfLongtermLoansToRelatedParties |