cm:Concept: us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities
       
          
          | Increase (Decrease) in Employee Related Liabilities | 
       
       
          
          | us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities | 
       
       
          
          | The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. | 
       
       
          
          | cm:Concept | 
       
       
          
          | Monetary (xbrli:monetaryItemType) | 
       
       
          
          | For Period (duration) | 
       
       
          
          | Debit | 
       
       
          
          | false | 
       
       
          
          | us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities |