| Standard label: | Operating Leases, Rent Expense, Sublease Rentals |
| Name: | us-gaap:OperatingLeasesRentExpenseSubleaseRentals1 |
| Documentation: | The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:OperatingLeasesRentExpenseSubleaseRentals1 |
| Label | Role | Language |
| Operating Leases, Rent Expense, Sublease Rentals | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 840 10 55 40 (Note 3) | http://fasb.org/us-gaap/role/ref/otherTransitionRef | 840 |