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cm:Concept: us-gaap:HeldToMaturitySecuritiesTransferredToTradingSecuritiesUnrealizedGainLoss
Standard label: Debt Securities, Held-to-maturity, Transfer to Trading, Unrealized Gain (Loss)
Name: us-gaap:HeldToMaturitySecuritiesTransferredToTradingSecuritiesUnrealizedGainLoss
Documentation: Amount of unrealized gain (loss) recognized in earnings from transfer of investment in debt security measured at amortized cost (held-to-maturity) to investment in debt security measured at fair value with change in fair value recognized in net income (trading). Includes other-than-temporary impairment (OTTI) previously recognized in other comprehensive income (OCI).
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:HeldToMaturitySecuritiesTransferredToTradingSecuritiesUnrealizedGainLoss

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Labels
Label Role Language
Debt Securities, Held-to-maturity, Transfer to Trading, Unrealized Gain (Loss) http://www.xbrl.org/2003/role/label en-US

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

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