| Standard label: | Auction Rate Securities, Noncurrent |
| Name: | us-gaap:AuctionRateSecuritiesNoncurrent |
| Documentation: | Amount of securities that are debt instruments (corporate or municipal bonds) that typically have long-term nominal maturities for which the interest rate is reset through an auction process. |
| 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:AuctionRateSecuritiesNoncurrent |
| Label | Role | Language |
| Auction Rate Securities, Noncurrent | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| Part Of Roll Up: |
| us-gaap:LongTermInvestments |