| Report Element Information |
| Run date/time: 7/23/2011 9:07:33 AM |
| Report Element Attributes: |
| Prefix: | pattern |
| Standard label: | Portfolio of Investments [Table] |
| Documentation: | Documentation for S&P Rating |
| Balance type: | |
| Period type: | |
| Report element type: | [Table] |
| Data type: | |
| ID: | pattern_PortfolioOfInvestmentsTable |
| Name: | pattern:PortfolioOfInvestmentsTable |
| Labels of Report Element |
| Role: | Label | Lang |
| (http://www.xbrl.org/2003/role/documentation) | Documentation for S&P Rating | en |
| Standard label (http://www.xbrl.org/2003/role/label) | Portfolio of Investments [Table] | en |