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cm:Level3TextBlock: us-gaap:CashProceedsReceivedAndTaxBenefitFromShareBasedPaymentAwardsTableTextBlock
Standard label: Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block]
Name: us-gaap:CashProceedsReceivedAndTaxBenefitFromShareBasedPaymentAwardsTableTextBlock
Documentation: Tabular disclosure of cash received from exercise of stock options and similar instruments granted under share-based payment arrangements and tax benefit from exercise of stock options.
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:CashProceedsReceivedAndTaxBenefitFromShareBasedPaymentAwardsTableTextBlock

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Labels
Label Role Language
Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 718 10 50 2A (a) http://fasb.org/us-gaap/role/ref/legacyRef 718