| Standard label: | Operating Leases, Future Minimum Payments Due |
| Name: | us-gaap:OperatingLeasesFutureMinimumPaymentsDue |
| Documentation: | Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:OperatingLeasesFutureMinimumPaymentsDue |
| Label | Role | Language |
| Operating Leases, Future Minimum Payments Due | http://www.xbrl.org/2003/role/label | en-US |
| Operating Leases, Future Minimum Payments Due, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 840 10 55 40 (Note 3) | http://fasb.org/us-gaap/role/ref/otherTransitionRef | 840 |
| FASB Accounting Standards Codification 840 20 50 2 (a) | http://fasb.org/us-gaap/role/ref/otherTransitionRef | 840 |