| Standard label: | Goodwill |
| Name: | us-gaap:Goodwill |
| Documentation: | Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. |
| 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:Goodwill |
| Label | Role | Language |
| Goodwill | http://www.xbrl.org/2003/role/label | en-US |
| Goodwill, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Goodwill, Beginning Balance | http://www.xbrl.org/2003/role/periodStartLabel | en-US |
| Goodwill, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 350 20 45 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 350 |
| FASB Accounting Standards Codification 350 20 45 5 | http://fasb.org/us-gaap/role/ref/legacyRef | 350 |
| Part Of Roll Up: |
| us-gaap:IntangibleAssetsNetIncludingGoodwill |
| us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet |