| Standard label: | Proceeds from Sale of Long-term Investments |
| Name: | us-gaap:ProceedsFromSaleOfLongtermInvestments |
| Documentation: | The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, beyond the current operating cycle. |
| 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:ProceedsFromSaleOfLongtermInvestments |
| Label | Role | Language |
| Proceeds from Sale of Long-term Investments | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 12 | http://www.xbrl.org/2009/role/commonPracticeRef | 230 |