| Standard label: | Impairment of Long-Lived Assets Held-for-use |
| Name: | us-gaap:ImpairmentOfLongLivedAssetsHeldForUse |
| Documentation: | The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ImpairmentOfLongLivedAssetsHeldForUse |
| Label | Role | Language |
| Impairment of Long-Lived Assets Held-for-use | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 28 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| FASB Accounting Standards Codification 360 10 50 2 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 360 |
| FASB Accounting Standards Codification 360 10 45 4 | http://fasb.org/us-gaap/role/ref/legacyRef | 360 |
| FASB Accounting Standards Codification 958 220 45 11 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 958 |
| Part Of Roll Up: |
| us-gaap:TangibleAssetImpairmentCharges |