| Report Element Information |
| Run date/time: 7/30/2011 9:35:33 AM |
| Report Element Attributes: |
| Prefix: | gaap |
| Standard label: | Share Ownership Plan, Share Options Outstanding, Beginning Balance |
| Documentation: | Duis sapien diam, dapibus sed, dictum quis, interdum ac, erat. Suspendisse urna. Proin non mauris. Proin sed odio. Phasellus sagittis orci quis orci. |
| Balance type: | |
| Period type: | As of (instant) |
| Report element type: | [Concept] |
| Data type: | Shares (xbrli:sharesItemType) |
| ID: | gaap_ShareOwnershipPlanShareOptionsOutstanding |
| Name: | gaap:ShareOwnershipPlanShareOptionsOutstanding |
| Labels of Report Element |
| Role: | Label | Lang |
| (http://www.xbrl.org/2003/role/documentation) | Duis sapien diam, dapibus sed, dictum quis, interdum ac, erat. Suspendisse urna. Proin non mauris. Proin sed odio. Phasellus sagittis orci quis orci. | en |
| Period end label (http://www.xbrl.org/2003/role/periodEndLabel) | Share Ownership Plan, Share Options Outstanding, Ending Balance | en |
| Period start label (http://www.xbrl.org/2003/role/periodStartLabel) | Share Ownership Plan, Share Options Outstanding, Beginning Balance | en |
| Standard label (http://www.xbrl.org/2003/role/label) | Share Ownership Plan, Share Options Outstanding | en |