| Standard label: | Restricted Cash Equivalents, Noncurrent |
| Name: | us-gaap:RestrictedCashEquivalentsNoncurrent |
| Documentation: | Amount of cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:RestrictedCashEquivalentsNoncurrent |
| Label | Role | Language |
| Restricted Cash Equivalents, Noncurrent | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02(17)) | http://www.xbrl.org/2009/role/commonPracticeRef | 210 |
| FASB Accounting Standards Codification 210 10 45 4 (a) | http://www.xbrl.org/2009/role/commonPracticeRef | 210 |
| FASB Accounting Standards Codification 230 10 50 8 | http://www.xbrl.org/2009/role/commonPracticeRef | 230 |
| FASB Accounting Standards Codification 954 210 45 5 | http://www.xbrl.org/2003/role/disclosureRef | 954 |
| Part Of Roll Up: |
| us-gaap:RestrictedCashAndCashEquivalentsNoncurrent |