| Report Element Information |
| Run date/time: 7/5/2011 4:05:33 PM |
| Report Element Attributes: |
| Prefix: | pattern |
| Standard label: | Director [Hierarchy] |
| Documentation: | Director [Hierarchy] |
| Balance type: | |
| Period type: | For Period (duration) |
| Report element type: | [Concept (Abstract)] |
| Data type: | Text/String (xbrli:stringItemType) |
| ID: | pattern_DirectorHierarchy |
| Name: | pattern:DirectorHierarchy |
| Labels of Report Element |
| Role: | Label | Lang |
| Standard label (http://www.xbrl.org/2003/role/label) | Director [Hierarchy] | en |