| Report Element Information |
| Run date/time: 7/23/2011 9:07:33 AM |
| Report Element Attributes: |
| Prefix: | pattern |
| Standard label: | Investment Description |
| Documentation: | Documentation for Shares |
| Balance type: | |
| Period type: | As of (instant) |
| Report element type: | [Concept] |
| Data type: | Text/String (xbrli:stringItemType) |
| ID: | pattern_InvestmentDescription |
| Name: | pattern:InvestmentDescription |
| Labels of Report Element |
| Role: | Label | Lang |
| (http://www.xbrl.org/2003/role/documentation) | Documentation for Shares | en |
| Standard label (http://www.xbrl.org/2003/role/label) | Investment Description | en |