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