cm:Concept: us-gaap:LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms
       
          
          | Line of Credit Facility, Frequency of Payment and Payment Terms | 
       
       
          
          | us-gaap:LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms | 
       
       
          
          | Description of the frequency of the required periodic payments of interest, principal, or both, and the amount, if set, or a description of a formula upon which payment is based. | 
       
       
          
          | cm:Concept | 
       
       
          
          | Text/String (xbrli:stringItemType) | 
       
       
          
          | For Period (duration) | 
       
       
          
          | (no balance type) | 
       
       
          
          | false | 
       
       
          
          | us-gaap:LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms |