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cm:Level2TextBlock: us-gaap:ShareBasedCompensationOptionAndIncentivePlansDirectorPolicy
Standard label: Share-based Payment Arrangement, Director [Policy Text Block]
Name: us-gaap:ShareBasedCompensationOptionAndIncentivePlansDirectorPolicy
Documentation: Disclosure of accounting policy for award granted to director under share-based payment arrangement. Includes, but is not limited to, methodology and assumption used in measuring cost.
Object type: cm:Level2TextBlock
Data type: Text Block (HTML) (nonnum:textBlockItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:ShareBasedCompensationOptionAndIncentivePlansDirectorPolicy

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Labels
Label Role Language
Share-based Payment Arrangement, Director [Policy Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 235 10 50 3 http://fasb.org/us-gaap/role/ref/legacyRef 235
FASB Accounting Standards Codification 718 10 50 1 http://fasb.org/us-gaap/role/ref/legacyRef 718