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cm:Concept: us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Standard label: Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months
Name: us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Documentation: Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.
Object type: cm:Concept
Data type: Monetary (xbrli:monetaryItemType)
Period type: As Of (instant)
Balance type: Debit
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

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Labels
Label Role Language
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 320 10 50 7 http://www.xbrl.org/2003/role/disclosureRef 320
FASB Accounting Standards Codification 326 30 50 5 http://www.xbrl.org/2003/role/disclosureRef 326
FASB Accounting Standards Codification 326 30 55 8 http://www.xbrl.org/2003/role/exampleRef 326

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Roll Up Relations
Part Of Roll Up:
us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition