| Standard label: | Proceeds from Sale, Maturity and Collection of Long-term Investments |
| Name: | us-gaap:ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments |
| Documentation: | The cash inflow from sales, maturities, prepayments, calls and collections 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:ProceedsFromSaleMaturityAndCollectionOfLongtermInvestments |
| Label | Role | Language |
| Proceeds from Sale, Maturity and Collection of Long-term Investments | http://www.xbrl.org/2003/role/label | en-US |
| Proceeds from Sale, Maturity and Collection of Long-term Investments, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 12 | http://www.xbrl.org/2009/role/commonPracticeRef | 230 |