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cm:Level3TextBlock: us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock
Standard label: Debt Securities, Available-for-sale [Table Text Block]
Name: us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock
Documentation: Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
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:DebtSecuritiesAvailableForSaleTableTextBlock

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Labels
Label Role Language
Debt Securities, Available-for-sale [Table Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 320 http://www.xbrl.org/2009/role/commonPracticeRef 320