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cm:Concept: us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
Standard label: Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)
Name: us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
Documentation: Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.
Object type: cm:Concept
Data type: Monetary (xbrli:monetaryItemType)
Period type: For Period (duration)
Balance type: Credit
Abstract: false
Workiva Wdesk Taxonomy Analyzer: us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

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Labels
Label Role Language
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 820 10 50 2 (d) http://www.xbrl.org/2003/role/disclosureRef 820