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cm:Level3TextBlock: us-gaap:ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock
Standard label: Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block]
Name: us-gaap:ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock
Documentation: Tabular disclosure of the effect of income (loss) on an entity's diluted earnings per share.
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:ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock
Examples of this text block disclosure: EarningsPerShareDilutedByCommonClassIncludingTwoClassMethod

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Labels
Label Role Language
Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] http://www.xbrl.org/2003/role/label en-US

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References
Reference Role Topic
FASB Accounting Standards Codification 220 10 S99 2 (SX 210.5-03.21) http://fasb.org/us-gaap/role/ref/legacyRef 220
FASB Accounting Standards Codification 260 10 50 1 (a) http://fasb.org/us-gaap/role/ref/legacyRef 260
FASB Accounting Standards Codification 260 10 45 2 http://fasb.org/us-gaap/role/ref/legacyRef 260
FASB Accounting Standards Codification 260 10 45 3 http://fasb.org/us-gaap/role/ref/legacyRef 260
FASB Accounting Standards Codification 260 10 45 5 http://fasb.org/us-gaap/role/ref/legacyRef 260
FASB Accounting Standards Codification 260 10 55 52 http://fasb.org/us-gaap/role/ref/legacyRef 260