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cm:Concept: us-gaap:PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale
Standard label: Payments to Acquire Mortgage-backed Securities (MBS), Available-for-sale
Name: us-gaap:PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale
Documentation: Amount of cash outflow for purchase of mortgage-backed security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
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:PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale

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Labels
Label Role Language
Payments to Acquire Mortgage-backed Securities (MBS), Available-for-sale http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 230 10 45 11 http://www.xbrl.org/2009/role/commonPracticeRef 230
FASB Accounting Standards Codification 230 10 45 13 (a) http://www.xbrl.org/2009/role/commonPracticeRef 230

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