| Standard label: | Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | 
| Name: | us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet | 
| Documentation: | Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. | 
| Object type: | cm:Concept | 
| Data type: | Monetary (xbrli:monetaryItemType) | 
| Period type: | As Of (instant) | 
| Balance type: | Debit | 
| Abstract: | false | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet | 
| Label | Role | Language | 
| Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | http://www.xbrl.org/2003/role/label | en-US | 
| Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total | http://www.xbrl.org/2003/role/totalLabel | en-US | 
| Reference | Role | Topic | 
| FASB Accounting Standards Codification 805 20 50 1 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 805 | 
| Part Of Roll Up: | 
| us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest |