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cm:Level3TextBlock: us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTableTextBlock
Standard label: Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]
Name: us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTableTextBlock
Documentation: Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities.
Object type: cm:Level3TextBlock
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:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTableTextBlock

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Labels
Label Role Language
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic