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cm:Concept: us-gaap:HeldtomaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureOtherPercentageOfNonperformingAssets
Standard label: Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Percentage of Nonperforming Assets
Name: us-gaap:HeldtomaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureOtherPercentageOfNonperformingAssets
Documentation: This item represents the percentage of nonperforming assets that the underlying assets in the security represent and which were considered as one of the potential factors in reaching a conclusion that the held-to-maturity investments are not other-than-temporarily impaired.
Object type: cm:Concept
Data type: Percent (num:percentItemType)
Period type: For Period (duration)
Balance type: (no balance type)
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:HeldtomaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureOtherPercentageOfNonperformingAssets

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Labels
Label Role Language
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Percentage of Nonperforming Assets http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 320 10 50 6 http://fasb.org/us-gaap/role/ref/legacyRef 320