| Report Element Information |
| Run date/time: 7/30/2011 9:35:27 AM |
| Report Element Attributes: |
| Prefix: | company |
| Standard label: | Class B Common Stock [Member] |
| Documentation: | Aliquam porta leo imperdiet pede. |
| Balance type: | |
| Period type: | For Period (duration) |
| Report element type: | [Member] |
| Data type: | [Member] (nonnum:domainItemType) |
| ID: | company_ClassBCommonStockMember |
| Name: | company:ClassBCommonStockMember |
| Labels of Report Element |
| Role: | Label | Lang |
| (http://www.xbrl.org/2003/role/documentation) | Aliquam porta leo imperdiet pede. | en |
| Standard label (http://www.xbrl.org/2003/role/label) | Class B Common Stock [Member] | en |